SOLUTION: 108=-0.5x^2 + 25x - 117

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: 108=-0.5x^2 + 25x - 117      Log On


   

Question 1147771: 108=-0.5x^2 + 25x - 117
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) About Me  (Show Source):
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.

            Since the solution and the answer by @josgarithmetic both are WRONG,
            I came to bring the correct solution. 


-0.5x%5E2%2B25x-225 = 0

0.5x%5E2-25x%2B225 = 0

x%5E2-50x%2B450 = 0


x%5B1%2C2%5D = %2850+%2B-+sqrt%282500-4%2A450%29%29%2F2


x%5B1%2C2%5D = %2850%2B-+sqrt%28700%29%29%2F2

x%5B1%2C2%5D = %2850%2B-+10%2Asqrt%287%29%29%2F2


x%5B1%2C2%5D = 25+%2B-+5%2Asqrt%287%29%29.      ANSWER

Solved.