How would I answer a question if it would be like this (a= -9 and b= -4)

Answer:
712
Step-by-step explanation:
So what you do is you have to substitute -9 for a and -4 b.
7(-4)^2 +5((-9)(-4)-6)=
=7(16)+5(30)=
=112+600=
=712
Answer:
Step-by-step explanation:
You see if A if are added you or divided by or multiply by B that’s the way how you do it