Question

(2x + 3)(3 –2x) – (2x –5)^2 –10x

Answer 1

$(2x + 3)(3 - 2x) - (2x - 5) \times 2 - 10x \\ 6x - 4x {}^{2} + 9 - 6x - 2x + 5 \times 2 - 10x \\ - 4x {}^{2} + 9 - 2x + 5 \times 2 - 10x \\ - 4x + (9 + 5 \times 2) + ( - 2x + - 10 x = - 4x + 90 - 12x = 0$