Question

If f(x)=-4x^2+15,then f(-3)=??

Answer 1

f(-3) = -4(-3)^2 + 15

f(-3) = -4(9) +15
f(-3) = -36 +15
f(-3) =  -11

Answer 2

Hey there!!

Okay so here are the steps to solving this....

f(x) = -4x² + 15
f(-3) = -4(-3)² + 25
f(-3) = -4(9) + 25
f(-3) = -36 + 25
f(-3) = -11    <-------- There is your answer!


I hope this helps! ^__^