SOLUTION: Use the quadratic formula to solve the equation. 5x^2 + 12x + 3 = 0 here is what I have tried 5x^2+12x=-3 12/2 = 6^2 = 36 5x^2+12x+36=-3+36 5x^2+12x+36=33 factor 5(x+6)(x

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Use the quadratic formula to solve the equation. 5x^2 + 12x + 3 = 0 here is what I have tried 5x^2+12x=-3 12/2 = 6^2 = 36 5x^2+12x+36=-3+36 5x^2+12x+36=33 factor 5(x+6)(x      Log On


   

Question 544108: Use the quadratic formula to solve the equation.
5x^2 + 12x + 3 = 0
here is what I have tried
5x^2+12x=-3
12/2 = 6^2 = 36
5x^2+12x+36=-3+36
5x^2+12x+36=33
factor
5(x+6)(x+6)=33
5(x+6)^2=33
5x+180=33
5x=-147
5x/5=-147/5
I am lost from here
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
You were ok in completing the square until
5(x+6)^2=33
You are supposed to use the quadratic formula. Do you know what that is?
(-b+-sqrt(b^2-4ac))/2a