Question

(2a + 3b) (a - b) = ?
(1) 2a' + ab-3b (2) 2a - ab + 3b?
(3) 2a + ab + 3b (4) 2a' - ab + 3b​

Answer 1

Answer:

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