SOLUTION: Solve by quadratic formula: 1.2x^2+px+18=0 2.5px^2-8x+2=0 Thank you.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: Solve by quadratic formula: 1.2x^2+px+18=0 2.5px^2-8x+2=0 Thank you.      Log On


   

Question 696796: Solve by quadratic formula:
1.2x^2+px+18=0
2.5px^2-8x+2=0
Thank you.
Answer by god2012(113) About Me  (Show Source):
You can put this solution on YOUR website!
We know that the formula for solving quadratic equation is
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
1. 2*x^2 + p*x +18 = 0
Here : a = 2
b = p
c = 18
Therefore : x+=+%28-p+%2B-+sqrt%28+p%5E2-4%2A2%2A18+%29%29%2F%282%2A2%29+
x+=+%28-p+%2B-+sqrt%28+p%5E2-144+%29%29%2F%284%29+
2. 5px^2-8x+2=0
Here : a = 5p
b = -8
c = 2
Therefore : x+=+%28-%28-8%29+%2B-+sqrt%28+%28-8%29%5E2-4%2A%285p%29%2A2+%29%29%2F%282%2A5%2Ap%29+
x+=+%288+%2B-+sqrt%28+64-40p+%29%29%2F%2810p%29+