Question

(x + y + 5)2 – (x – 5)(x + 5).

Answer 1

2х + 2y + 10 - x² + 25 = - x² + 2x + 2y + 35

Answer 2

Ответ: 2x+2y+35-x^2

Объяснение:

(x + y + 5)2 – (x – 5)(x + 5)

2x+2y+10-(x^2-25)

2x+2y+10-x^2+25

2x+2y+35-x^2