# If #f(x) = 3x^2-x#, what is #f(-5)#?

##### 2 Answers

Jul 4, 2018

#### Explanation:

This simplifies to

Hope this helps!

Jul 4, 2018

#### Explanation:

#"substitute " x = -5 " into "f(x)#

#f(color(red)(-5))=3(color(red)(-5))^2-(color(red)(-5))#

#color(white)(xxxx)=(3xx25)+5#

#color(white)(xxxx)=75+5=80#