◀ back to index
Question
Find the polynomial having roots at 1 , −2 , 3 and −4 .
Answer
The polynomial generated from the given zeros is: P(x)=x4+2x3−13x2−14x+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+2x3−13x2−14x+24