3.7 day 2 finding complex zeros - poudre school district · 2008. 12. 9. · 3.7 day 2 finding...
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3.7 Day 2 Finding Complex Zeros
1
December 09, 2008
Dec 2 7:52 PM
3.7 Day 2Finding Complex Zeros
Objective: To find zeros when some are already given
3.7 Day 2 Finding Complex Zeros
2
December 09, 2008
Dec 2 7:54 PM
Use the given zero to find the remaining zeros
f(x) = x 7x + 13x 7x + 12 zero: i4 3 2
Step 1: Determine how many zeros there are4
Step 2: Find the complex conjugate of the given zero
i, iStep 3: Write the zeros as factors and expand
(x i)(x + i)
x + ix ix i 22
x (1)2
x + 12
3.7 Day 2 Finding Complex Zeros
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December 09, 2008
Dec 2 7:54 PM
Use the given zero to find the remaining zeros
f(x) = x 7x + 13x 7x + 12 zero: i4 3 2
Step 4: Use long division to find the remaining zeros
x + 12 x 7x + 13x 7x + 124 3 2
3.7 Day 2 Finding Complex Zeros
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December 09, 2008
Dec 2 7:54 PM
Use the given zero to find the remaining zeros
f(x) = x 7x + 13x 7x + 12 zero: i4 3 2
Step 5: Factor if necessary to find remaining zeros.
zeros: i, i, 3, 4
3.7 Day 2 Finding Complex Zeros
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December 09, 2008
Dec 2 7:54 PM
Use the given zero to find the remaining zeros
f(x) = x 7x + 19x 23x + 104 3 2 zero: 2 i
3.7 Day 2 Finding Complex Zeros
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December 09, 2008
Dec 2 7:54 PM
Use the given zero to find the remaining zeros
zeros: 2 i, 2 + i, 1, 2
f(x) = x 7x + 19x 23x + 104 3 2 zero: 2 i
3.7 Day 2 Finding Complex Zeros
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December 09, 2008
Dec 2 7:54 PM
HomeworkPg. 237#'s: 7 15 odds, 2128