Find the polynomial having roots at $ -\dfrac{ 5 }{ 4 } $ , $ \dfrac{ 7 }{ 10 } $ and $ 3 $ .
Answer
The polynomial generated from the given zeros is: $ P(x) = 40x^3-98x^2-101x+105 $
Explanation
Step 1: Turn the zeros into factors:
| Zero | Factor |
| $ -\dfrac{ 5 }{ 4 } $ | $ 4x+5 $ |
| $ \dfrac{ 7 }{ 10 } $ | $ 10x-7 $ |
| $ 3 $ | $ x-3 $ |
Step 2: Multiply the factors together:
$$ P(x) = \left( 4x+5 \right) \cdot \left( 10x-7 \right) \cdot \left( x-3 \right) = 40x^3-98x^2-101x+105 $$This page was created using
Polynomial From Roots Calculator