Question

(x²+5y²)² – (x²–5y)²​

Answer 1

Answer:

5y is answer

Step-by-step explanation:

Please mark as a brain list

Answer 2

use this formula below.,

a²-b²=(a-b)(a+b)

solution;

(x²+5y²)² – (x²–5y²)²​

=[x²+5y²+x²–5y²] [x²+5y²-(x²-5y²)]

=(2x²)[x²+5y²-x²+5y²]

=(2x²)(10y²)

=20x²y²