SOLUTION: What is the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x^2 + 8x + 5

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: What is the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x^2 + 8x + 5      Log On


   

Question 885892: What is the approximate values of x that are solutions to f(x) = 0, where
f(x) = -9x^2 + 8x + 5
Found 2 solutions by rfer, kadash12:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
f(0)=-9*0^2+8*0+5
f(0)=5

Answer by kadash12(6) About Me  (Show Source):
You can put this solution on YOUR website!
f(x) = -9x^2 + 8x + 5
0=-9x^2 + 8x + 5 use quadratic equation
+formula+ x+=+%28-8+%2B-+sqrt%28+8%5E2-4%2A%28-9%29%2A5+%29%29%2F%282%2A-9%29
x = (1/9) 4 +- sqrt61
which leads to about x=1.312 and x=-0.423