Posted by Geli on .
what is the solution set of 4x2=5x+9?
p.s. its suppose to be 4xsquared=5x+9

algebra 
Henry,
4x^2 = 5x + 9
4x^2 + 5x + 9 = 0
Use Quadratic Formula:
X = 5 + (sqrt(5^24*4*9))/2*4
X = (5 + sqrt(119))/8
X = (5 + 10.91i)/8
X = 0.625+1.36i, and 0.6251.36i.