Question

Помогите решить, пожалуйста
(X+7)^2 -(X -5) (X+19)=

Answer 1

$(x + 7) {}^{2} - (x - 5)(x + 19) = \ x {}^{2} + 14x + 49 - (x {}^{2} + 19x - 5x - 95 )= \ x {}^{2} + 14x + 49 - x {}^{2} - 19x + 5x + 95 = 144$