SOLUTION: Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x^ + 5x + 3.

Algebra ->  Rational-functions -> SOLUTION: Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x^ + 5x + 3.      Log On


   

Question 939985: Select the approximate values of x that are solutions to f(x) = 0, where
f(x) = -2x^ + 5x + 3.
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29+=+-2x%5E2+%2B+5x+%2B+3
0+=+-%282x%5E2+-+5x+-+3%29
0+=+-%282x%5E2+-+6x%2Bx+-+3%29
0+=-%28%282x%5E2+-+6x%29%2B%28x+%2B+3%29%29
0+=+-%282x%28x-3%29%2B%28x-3%29%29
0+=+-%282x%2B1%29%28x-3%29
-%282x%2B1%29%28x-3%29=0
solutions:
if %282x%2B1%29=0=> 2x=-1=>x=-1%2F2
if %28x-3%29=0=> x=3

+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+-2x%5E2+%2B+5x+%2B+3%29+