Question

4a^2-2b^2+40 a=2. b=7

Answer 1

I agree -92 sounds correct
Hope this helps

Answer 2

-92

Explanation:

4a^2-2b^2+40 a=2. b=7

Fill in variables

4(2)^2-2(7)^2+40 a=2. b=7

8^2 - 14^2 + 40

64 - 196 +40 = -92