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Question
Find the polynomial having roots at 1 , 6 , −7 and −2 .
Answer
The polynomial generated from the given zeros is: P(x)=x4+2x3−43x2−44x+84
Explanation
Step 1: Turn the zeros into factors:
Zero | Factor |
1 | x−1 |
6 | x−6 |
−7 | x+7 |
−2 | x+2 |
Step 2: Multiply the factors together:
P(x)=(x−1)⋅(x−6)⋅(x+7)⋅(x+2)=x4+2x3−43x2−44x+84