SOLUTION: What is the value of f(-9) when f(x)=2x to the power of 2 +3x-4

Question 832627: What is the value of f(-9) when f(x)=2x to the power of 2 +3x-4
Answer by math-vortex(648) (Show Source): You can put this solution on YOUR website!

Hi, there--

THE PROBLEM:
What is the value of f(-9) when f(x)=2x to the power of 2 +3x-4

A SOLUTION:
You have the function


To find f(-9) substitute -9 for x in the function.


Now simplify the right-hand side.



That's all there is to it.



Hope this helps! Feel free to email if you have any questions about the solution.

Good luck with your math,

Mrs. F
math.in.the.vortex@gmail.com

RELATED QUESTIONS
Let f (x) = x to the power of 2 + 3x -3 find f (-4) ; f (-1) ;... (answered by math-vortex)

What is the value of f(-3). The equation is f(-3)?f(x) = 2x second power+... (answered by jim_thompson5910)

what is the value of f(-2) when... (answered by checkley75)

What is the value of g(x) - f(x) if: f(x) = 2x + 4 g(x) = 3x - 2 x =... (answered by Theo)

Let f(x)=2x^2 + 3x - 5. What is the value of... (answered by Alwayscheerful)

Evaluate the function for the given value of x: 1.) f(x) = 80-3x; f(5) 2.) f(x) = (answered by jennywecas)

find the value of f(0) of the function f(x)= 3x(to the second power) +... (answered by dolly)

f(x)=2x+9 and g(x)=x^2+4 what is the value of f(g(4)) and... (answered by edjones)

When f(X) =x-7/2 what is the value of (f^0... (answered by Fombitz)