Mathematics: What are the roots of the polynomial f(x)=x^2+9x-70?

What are the roots of the polynomial f(x)=x^2+9x-70?

Ответ:

kelseybell5360

14.03.2022

Roots of the polynomial are values of x when f(x)=0,so
to find the roots of the polynomial we need to solve the equation
x²+9x-70=0 , a=1, b=9,c=-70

$x= \frac{-b+/- \sqrt{ b^{2}-4ac } }{2a}


$

$x= \frac{-9+/- \sqrt{81+4*1*70} }{2} = \frac{-9+/- \sqrt{361} }{2}= \frac{-9+/-19}{2} 

x_{1}=5, x_{2}=-14
$

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Ответ:

sophiaa23

05.08.2022

Mathematics

Hdndhejsn

Step-by-step explanation:

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What are the roots of the polynomial f(x)=x^2+9x-70?

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