Question

(x+4) ^2 - (x-2) (x+2)

Answer 1

${x}^{2} + 8x + 16 - (xy + 2y - 2x - 4) = \\ = {x}^{2} + 8x + 16 - xy - 2y + 2x + 4 = \\ = {x}^{2} + 10x + 20 - xy - 2y$