SOLUTION: Solve. 4x squared = 13x + 12

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Solve. 4x squared = 13x + 12      Log On


   

Question 114254: Solve.
4x squared = 13x + 12
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
4x%5E2+=+13x+%2B+12....write it in the standard form
4x%5E2+-+13x+-+12+=+0...use quadratic formula


x%5B1%2C2%5D=%28-b+%2B-+sqrt+%28b%5E2+-4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29



x%5B1%2C2%5D=%2813+%2B-+sqrt+%28169+%2B+192+%29%29+%2F+8
x%5B1%2C2%5D=%2813+%2B-+sqrt+%28361%29%29+%2F+8

x%5B1%2C2%5D=%2813+%2B-+19%29+%2F+8

x%5B1%5D=%2813+%2B+19%29%2F8
x%5B1%5D=32%2F8
x%5B1%5D=+4......first solution

x%5B2%5D=%2813+-+19%29+%2F+8
x%5B2%5D=+-+6+%2F+8..........reduce
x%5B2%5D=+-+3+%2F+4......second solution