Question

За(За – 2b) + b2 - C2​

Answer 1

9a^2- 6ab +b^2 -c^2

(3a)^2-2×3a×b +(b)^2 -c^2

(3a-b)^2-(c)^2 (a^2-b^2)

(3a-b+c)(3a-b-c)