Question

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

Answer 1

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= (-9+/- √(81+4*1*70) )/(2) = (-9+/- √(361) )/(2)= (-9+/-19)/(2) x_(1)=5, x_(2)=-14`