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Question
Find the polynomial having roots at −3 , −2 , 1 and 5 .
Answer
The polynomial generated from the given zeros is: P(x)=x4−x3−19x2−11x+30
Explanation
Step 1: Turn the zeros into factors:
Zero | Factor |
−3 | x+3 |
−2 | x+2 |
1 | x−1 |
5 | x−5 |
Step 2: Multiply the factors together:
P(x)=(x+3)⋅(x+2)⋅(x−1)⋅(x−5)=x4−x3−19x2−11x+30