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Question
Find the polynomial having roots at 3 , 4 , 2 and −4 .
Answer
The polynomial generated from the given zeros is: P(x)=x4−5x3−10x2+80x−96
Explanation
Step 1: Turn the zeros into factors:
Zero | Factor |
3 | x−3 |
4 | x−4 |
2 | x−2 |
−4 | x+4 |
Step 2: Multiply the factors together:
P(x)=(x−3)⋅(x−4)⋅(x−2)⋅(x+4)=x4−5x3−10x2+80x−96