Question

(а +8)^2-(а+8)(а-2)+(а-2)^2

Answer 1

(а^2+2а•8+8^2)-(а^2-2а+8а-16)+(а^2-2а•2+2^2) = а^2+16а+64-а^2+2а-8а+16+а^2-4а+4 = а^2+6а+84