SOLUTION: 16x+12x=7 quadratic formula

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: 16x+12x=7 quadratic formula      Log On


   

Question 209591: 16x+12x=7 quadratic formula
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve using the quadratic formula:x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2a:
16x%5E2%2B12x+=+7 Subtract 7 from both sides.
16x%5E2%2B12x-7+=+0 Here, a = 16, b = 12, and c = -7; Substitute into the formula:
x+=+%28-12%2B-sqrt%2812%5E2-4%2A%2816%29%2A%28-7%29%29%29%2F2%2816%29 Evaluate.
x+=+%28-12%2B-sqrt%28144-%28-448%29%29%29%2F32
x+=+%28-12%2B-sqrt%28592%29%29%2F32
x+=+-0.375%2B0.76 or x+=+-0.375-0.76
highlight%28x+=+0.385%29 or highlight%28x+=+-1.135%29