Question

1. 3 и 5 пожалуйста_​

Answer 1

Объяснение:

1)

$9x + xy + 8y + 72 = x \times (9 + y) + 8(y + 9) = (9 + y) \times(x + 8)$

3)

$4a - ay - by + 4b = a \times (4 - y) + b \times ( - y + 4) = (4 - y) \times (a + b)$

5)

$11ay - by - 77a + 7b = y \times (11a - b) - 7(11a - b) = (11a - b) \times (y - 7)$