Question

(5a - 3) (a + 4) - (2a + 5) (3a - 4)​

Answer 1

Answer:

$(5a - 3)(a + 4) - (2a + 5)(3a - 4) \\ \\ (5 {a}^{2} + 20a - 3a - 12) - (6 {a}^{2} - 8a + 15a - 20) \\ \\ 5 {a}^{2} + 20a - 3a - 12 - 6 {a}^{2} + 8a - 15a + 20 \\ \\ - {a}^{2} + 28a - 18a + 8 \\ \\ - {a}^{2} + 10 a+ 8$