f(x)=5x^2+4x. how do i find the value(s) of x when f(x)=1

Question

if f(x)=5x^2+4x how is it gonna equal 1. i really need help please

Answer 1

Set f(x) = 1 and solve for x.

 

1 = 5x² + 4x

 

5x² + 4x - 1 = 0

 

Solve this quadratic equation for x, which you should know how to do.  You will get 2 real solutions for x.