# If #f(x) = 3x^2 - x#, how do you find f(-2)?

##### 1 Answer

Apr 10, 2018

#### Explanation:

#"substitute " x = - 2" into "f(x)#

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

#color(white)(xxxx)=(3xx4)+2=12+2=14#