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Question
Find the polynomial having roots at 4 , −2 , 3 and −5 .
Answer
The polynomial generated from the given zeros is: P(x)=x4−27x2+14x+120
Explanation
Step 1: Turn the zeros into factors:
Zero | Factor |
4 | x−4 |
−2 | x+2 |
3 | x−3 |
−5 | x+5 |
Step 2: Multiply the factors together:
P(x)=(x−4)⋅(x+2)⋅(x−3)⋅(x+5)=x4−27x2+14x+120