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Question
Find the polynomial having roots at −1 , −2 , 3 and 4 .
Answer
The polynomial generated from the given zeros is: P(x)=x4−4x3−7x2+22x+24
Explanation
Step 1: Turn the zeros into factors:
Zero | Factor |
−1 | x+1 |
−2 | x+2 |
3 | x−3 |
4 | x−4 |
Step 2: Multiply the factors together:
P(x)=(x+1)⋅(x+2)⋅(x−3)⋅(x−4)=x4−4x3−7x2+22x+24