Question

f(x)=3x^2+x f(x)=3x 2 +x \text{Find }f(-5) Find f(−5)

Answer 1

So the equation given is: $3x^2+x$

What do we find: f(-5)

To find f(-5), we must plug '-5' into the equation in place of the 'x'

   $f(-5) = 3(-5)^2+(-5) = 3 * 25 -5=75-5=70$

Answer: f(-5) = 70

Hope that helps!