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Splash Screen. Five-Minute Check (over Lesson 5–4) CCSS Then/Now New Vocabulary Key Concept: Sum and Difference of Cubes Example 1:Sum and Difference of Cubes Concept Summary: Factoring Techniques Example 2:Factoring by Grouping Example 3:Combine Cubes and Squares - PowerPoint PPT Presentation

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Page 1: Splash Screen
Page 2: Splash Screen

Five-Minute Check (over Lesson 5–4)

CCSS

Then/Now

New Vocabulary

Key Concept: Sum and Difference of Cubes

Example 1: Sum and Difference of Cubes

Concept Summary: Factoring Techniques

Example 2: Factoring by Grouping

Example 3: Combine Cubes and Squares

Example 4: Real-World Example: Solve Polynomial Functions by Factoring

Key Concept: Quadratic Form

Example 5: Quadratic Form

Example 6: Solve Equations in Quadratic Form

Page 3: Splash Screen

Over Lesson 5–4

A. –3

B. –2

C. 2

D. 4

Which is not a zero of the function f(x) = x3 – 3x2 – 10x + 24?

Page 4: Splash Screen

Over Lesson 5–4

A. x = –2.5

B. x = 0

C. x = 1.5

D. x = 2.5

Use the table of values for f(x) = x4 – 12x2 + 5. Estimate the x-coordinates at which any relative maxima and relative minima occur. Which is not a possible relative maximum or relative minimum?

Page 5: Splash Screen

Over Lesson 5–4

A. 0.5

B. 0

C. –0.5

D. –1.5

Estimate the x-value at which the relative minimum of f(x) = x4 + x + 2 occurs.

Page 6: Splash Screen

Over Lesson 5–4

A. (–∞, –3), (1, 4)

B. (–4, –3), (1, 3)

C. (–∞, –3), (1, ∞)

D. (–∞, –2), (1, 2)

For which part(s) of its domain does the function f(x) = x3 – 2x2 – 11x + 12 have negative f(x) values?

Page 7: Splash Screen

Content Standards

A.CED.1 Create equations and inequalities in one variable and use them to solve problems.

Mathematical Practices

4 Model with mathematics.

Page 8: Splash Screen

You solved quadratic functions by factoring.

• Factor polynomials.

• Solve polynomial equations by factoring.

Page 9: Splash Screen

• prime polynomials

• quadratic form

Page 10: Splash Screen
Page 11: Splash Screen

Sum and Difference of Cubes

A. Factor the polynomial x

3 – 400. If the polynomial cannot be factored, write prime.

Answer: The first term is a perfect cube, but the second term is not. It is a prime polynomial.

Page 12: Splash Screen

Sum and Difference of Cubes

B. Factor the polynomial 24x

5 + 3x

2y

3. If the polynomial cannot be factored, write prime.

24x

5 + 3x

2y

3 = 3x

2(8x

3 + y

3) Factor out the GCF.

8x

3 and y

3 are both perfect cubes, so we can factor the sum of the two cubes.

(8x

3 + y

3) = (2x)3 + (y)3 (2x)3 = 8x

3; (y)3 = y

3

= (2x + y)[(2x)2 – (2x)(y) + (y)2]

Sum of two cubes

Page 13: Splash Screen

Sum and Difference of Cubes

= (2x + y)[4x

2 – 2xy + y

2]

Simplify.

24x

5 + 3x

2y

3 = 3x

2(2x + y)[4x

2 – 2xy + y

2]

Replace the GCF.

Answer: 3x

2(2x + y)(4x

2 – 2xy + y

2)

Page 14: Splash Screen

A. Factor the polynomial 54x

5 + 128x

2y

3. If the polynomial cannot be factored, write prime.

A.

B.

C.

D. prime

Page 15: Splash Screen

A.

B.

C.

D. prime

B. Factor the polynomial 64x

9 + 27y

5. If the polynomial cannot be factored, write prime.

Page 16: Splash Screen
Page 17: Splash Screen

Factoring by Grouping

A. Factor the polynomial x

3 + 5x

2 – 2x – 10. If the polynomial cannot be factored, write prime.

x

3 + 5x

2 – 2x – 10 Original expression

= (x

3 + 5x

2) + (–2x – 10) Group to find a GCF.

= x

2(x + 5) – 2(x + 5) Factor the GCF.

= (x + 5)(x

2 – 2) Distributive Property

Answer: (x + 5)(x

2 – 2)

Page 18: Splash Screen

Factoring by Grouping

B. Factor the polynomial a

2 + 3ay + 2ay

2 + 6y

3. If the polynomial cannot be factored, write prime.

a

2 + 3ay + 2ay

2 + 6y

3 Original expression

= (a

2 + 3ay) + (2ay

2 + 6y

3) Group to find a GCF.

= a(a + 3y) + 2y

2(a + 3y) Factor the GCF.

= (a + 3y)(a + 2y

2) Distributive Property

Answer: (a + 3y)(a + 2y

2)

Page 19: Splash Screen

A. (d + 2)(d

2 + 2)

B. (d – 2)(d

2 – 4)

C. (d + 2)(d

2 + 4)

D. prime

A. Factor the polynomial d

3 + 2d

2 + 4d + 8. If the polynomial cannot be factored, write prime.

Page 20: Splash Screen

A. (r – 2s)(r + 4s

2)

B. (r + 2s)(r + 4s

2)

C. (r + s)(r – 4s

2)

D. prime

B. Factor the polynomial r 2 + 4rs

2 + 2sr + 8s

3. If the polynomial cannot be factored, write prime.

Page 21: Splash Screen

Combine Cubes and Squares

A. Factor the polynomial x

2y

3 – 3xy

3 + 2y

3 + x

2z

3 – 3xz

3 + 2z

3. If the polynomial cannot be factored, write prime.

With six terms, factor by grouping first.

Group to find a GCF.

Factor the GCF.

Page 22: Splash Screen

Combine Cubes and Squares

Sum of cubes

Distributive Property

Factor.

Page 23: Splash Screen

Combine Cubes and Squares

B. Factor the polynomial 64x

6 – y

6. If the polynomial cannot be factored, write prime.

This polynomial could be considered the difference of two squares or the difference of two cubes. The difference of two squares should always be done before the difference of two cubes for easier factoring.

Difference of two squares

Page 24: Splash Screen

Combine Cubes and Squares

Sum and difference of two cubes

Page 25: Splash Screen

A. Factor the polynomial r

3w

2 + 6r 3w + 9r

3 + w

2y

3 + 6wy

3 + 9y

3. If the polynomial cannot be factored, write prime.

A.

B.

C.

D. prime

Page 26: Splash Screen

B. Factor the polynomial 729p

6 – k

6. If the polynomial cannot be factored, write prime.

A.

B.

C.

D. prime

Page 27: Splash Screen

Solve Polynomial Functions by Factoring

GEOMETRY Determine the dimensions of the cubes below if the length of the smaller cube is one half the length of the larger cube, and the volume of the shaded figure is 23,625 cubic centimeters.

Page 28: Splash Screen

Solve Polynomial Functions by Factoring

Since the length of the smaller cube is half the length of the larger cube, then their lengths can be represented by x and 2x, respectively. The volume of the object equals the volume of the larger cube minus the volume of the smaller cube.

Volume of object

Subtract.

Divide.

Page 29: Splash Screen

Solve Polynomial Functions by Factoring

Answer: Since 15 is the only real solution, the lengths of the cubes are 15 cm and 30 cm.

Subtract 3375 from each side.

Difference of cubes

Zero Product Property

Page 30: Splash Screen

A. 7 cm and 14 cm

B. 9 cm and 18 cm

C. 10 cm and 20 cm

D. 12 cm and 24 cm

GEOMETRY Determine the dimensions of the cubes below if the length of the smaller cube is one half the length of the larger cube, and the volume of the shaded figure is 5103 cubic centimeters.

Page 31: Splash Screen
Page 32: Splash Screen

Quadratic Form

A. Write 2x

6 – x

3 + 9 in quadratic form, if possible.

2x

6 – x

3 + 9 = 2(x

3)2 – (x

3) + 9

Answer: 2(x

3)2 – (x

3) + 9

Page 33: Splash Screen

Quadratic Form

B. Write x

4 – 2x

3 – 1 in quadratic form, if possible.

Answer: This cannot be written in quadratic form since x

4 ≠ (x

3)2.

Page 34: Splash Screen

A. 3(2x

5)2 – (2x

5) – 3

B. 6x5(x5) – x5 – 3

C. 6(x

5)2 – 2(x

5) – 3

D. This cannot be written in quadratic form.

A. Write 6x

10 – 2x

5 – 3 in quadratic form, if possible.

Page 35: Splash Screen

A. (x

8)2 – 3(x

3) – 11

B. (x

4)2 – 3(x

3) – 11

C. (x

4)2 – 3(x

2) – 11

D. This cannot be written in quadratic form.

B. Write x

8 – 3x

3 – 11 in quadratic form, if possible.

Page 36: Splash Screen

Solve Equations in Quadratic Form

Solve x

4 – 29x

2 + 100 = 0.

Original equation

Factor.

Zero Product Property

Replace u with x

2.

Page 37: Splash Screen

Solve Equations in Quadratic Form

Take the square root.

Answer: The solutions of the equation are 5, –5, 2, and –2.

Page 38: Splash Screen

A. 2, 3

B. –2, –3

C. –2, 2, –3, 3

D. no solution

Solve x

6 – 35x

3 + 216 = 0.

Page 39: Splash Screen