F(x)=6x^2-x Find f(-3)

Question

asked Mar 7, 2020 181k views

2 Answers

Changtung · Answer 1 · 2020-03-13T02:13:21+0000

Answer:
f(-3)=57

Explanation:

Given the following function:

f(x)=6x^2-x

To find
f(-3) you need to substitute the x value
x=-3 into the function
f(x) given.

Therefore, when the input value (value of the variable "x") is -3, then the ouput value is:

$x=-3\\\\f(-3)=6(-3)^2-(-3)$

Remember the multplication of signs:

$(+)(+)=+\\(-)(-)=+\\(-)(+)=-$

Then:

f(-3)=57