Question

1. (ax + by)2 + (bx - ay)2​

Answer 1

1)2ax+2by+2bx-2ay

=2by+2bx

=2b(y+x)

Answer 2

Step-by-step explanation:

$(ax + by) {}^{2} + (bx - ay) {}^{2} \\ \\ a {}^{2} {x}^{2} + b {}^{2} {y}^{2} + 2abxy + b {}^{2} {x}^{2} + a {}^{2} y {}^{2} \\ - 2abx y\\a {}^{2} x {}^{2} +b {}^{2} y {}^{2} + b {}^{2} x {}^{2} + a {}^{2} y {}^{2}$

I hope it helps you Mark me as brainlist please