Question

1. (a-b)(2a+3b)
2. (x-z)(2x-5z)

Answer 1

Ответ:

1.

$(a - b)(2a + 3b) = 2 {a}^{2} - 3ab - 2ab - 3 {b}^{2} = 2 {a}^{2} - 3 {b}^{2} - ab$

2.

$(x - z)(2x - 5z) = 2 {x}^{2} - 5xz - 2xz + 5 {z}^{2} = 2 {x}^{2} - 5 {z}^{2} + 3xz$