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Question
Find the polynomial having roots at 2 , −7 and −3 .
Answer
The polynomial generated from the given zeros is: P(x)=x3+8x2+x−42
Explanation
Step 1: Turn the zeros into factors:
Zero | Factor |
2 | x−2 |
−7 | x+7 |
−3 | x+3 |
Step 2: Multiply the factors together:
P(x)=(x−2)⋅(x+7)⋅(x+3)=x3+8x2+x−42