Question

SOMEONE PLEASE JUST ANSWER THIS FOR BRAINLIEST!!!

Answer 1

Answer:

 2 a^4 -2a^2b^2 -6b^4

Step-by-step explanation:

C = 7a^4 + 5a^2b^2 -3b^4

D = 5a^4 +7a^2b^2 +3b^4

C-D = 7a^4 + 5a^2b^2 -3b^4 - ( 5a^4 +7a^2b^2 +3b^4)

Distribute the minus sign

   7a^4 + 5a^2b^2 -3b^4 -  5a^4 -7a^2b^2 -3b^4

I like to line them up vertically

 7a^4 + 5a^2b^2 -3b^4

-  5a^4 -7a^2b^2 -3b^4

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 2 a^4 -2a^2b^2 -6b^4