what is the solution set of -4x2=5x+9?
p.s. its suppose to be -4xsquared=5x+9
-4x^2 = 5x + 9
4x^2 + 5x + 9 = 0
Use Quadratic Formula:
X = -5 +- (sqrt(5^2-4*4*9))/2*4
X = (-5 +- sqrt(-119))/8
X = (-5 +- 10.91i)/8
X = -0.625+1.36i, and -0.625-1.36i.