SOLUTION: if f(x)=3x^2-x-7, then the value of f(-x)is a. 3x^2+x-7 b. -3x^2+x-7 c. -3x^2-x-7 d. -3x^2-x+7

Algebra ->  Inequalities -> SOLUTION: if f(x)=3x^2-x-7, then the value of f(-x)is a. 3x^2+x-7 b. -3x^2+x-7 c. -3x^2-x-7 d. -3x^2-x+7      Log On


   

Question 972750: if f(x)=3x^2-x-7, then the value of f(-x)is
a. 3x^2+x-7
b. -3x^2+x-7
c. -3x^2-x-7
d. -3x^2-x+7
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

if f%28x%29=3x%5E2-x-7, then the value of f%28-x%29is
f%28-x%29=3%28-x%29%5E2-%28-x%29-7
f%28-x%29=3x%5E2%2Bx-7
so, your answer is:
a. 3x%5E2%2Bx-7