Question

For which value of x is f (x) = -65 given f (x) = -3x2 - 2x For which value of x is f (x) = -65 given f (x) = -3x2 - 2x @Mathematics

Answer 1

29.5

Answer 2

set -3x^2-2x=-65
3x^2+2x-65=0 set equal to 0
(x+5)(3x-13)=0 factor
x=5=0 or 3x-13=0 zero-factor theorem
x=-5 or x=13/3 solve