Question

(ax +by)² + (bx-ay)²​

Answer 1

this is answer according to me, i have first used identities (a+ b)^2=a^2+b^2+2ab and then i have used (a- b)^2=a^2+b^2-2ab then i have cut -2ab and +2ab after this i arranged the terms and took common factor out and then regrouped

Answer 2

Answer:

hope it helps you this answer in image