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Question
Find the polynomial having roots at −21 , 31 , 1 and 2 .
Answer
The polynomial generated from the given zeros is: P(x)=6x4−17x3+8x2+5x−2
Explanation
Step 1: Turn the zeros into factors:
Zero | Factor |
−21 | 2x+1 |
31 | 3x−1 |
1 | x−1 |
2 | x−2 |
Step 2: Multiply the factors together:
P(x)=(2x+1)⋅(3x−1)⋅(x−1)⋅(x−2)=6x4−17x3+8x2+5x−2