4.3b & 4 rr

Agenda Thursday, Nov. 12

homework 4 p. 193 # 21 - 24, 34 - 40 and p. 198 # 13 - 23

Quiz tomorrow on Ch. 4.1 - 4.4 (see checkpoint quiz p. 199 for sample problems)

4.3 - prime factorization with variable expressions4.4- simplifying fractions

Find the GCF of a variable expression.

Find the prime factorization of the coefficient.Write the variables in expanded form. Find common factors.

Example8xy2 and 6x3y

2*2*2*x*y*y 2*3*x*x*x*y

GCF = 2xy

Prime Factors of 4a3b

Prime Factors of 6a2b2

4a3b = 2*2*a*a*a*b

6a2b2 = 2*3*a*a*b*b

Find the prime factorization of each variable expression. Use the diagram below to show the prime factors. Then use it to find the GCF.

Directions: Use Venn diagrams to find the GCF of each set of numbers.

1) 4xy2, 2x2y GCF = 2xy

2) 6a2b2, 4ab3 GCF = 2ab2

3) 10m3n, 15m2n2 GCF = 5m2n

Find two fractions that are equivalent to

5858

Write in simplest form:

68

To write algebraic fractions in simplest form, first write the prime factorization of the expression.

Then divide the numerator and denominator by the common factors.

9 x 3*3*x3xy 3*x*y

4ab2 2*2*a*b*b16ac 2*2*2*2*a*c

Now you try:

Complete Quick Check 3 on p. 197

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