Question

СРОЧНО ДАМ 25 БАЛЛОВ​

Answer 1

Ответ:

$1)(2x + 3)(5x - 1) - (4x - 6)(1 - x) = 14x {}^{2} + 3x + 3 \\ 10x {}^{2} - 2x + 15x - 3 - (4x - 4x {}^{2} - 6 + 6x) \\ 10x {}^{2} - 2x + 15x - 3 - (10x - 4x {}^{2} - 6) \\ 10x {}^{2} - 2x + 15x - 3 - 10x + 4x {}^{2} + 6 \\ 14x {}^{2} + 3x + 3 \\ ——————————————— \\ 2)(c {}^{2} - 2c + 2)(c {}^{2} + 2c - 2) = c {}^{4} - 4c {}^{2} + 8c - 4 \\ c {}^{4} - ( - 2c + 2) {}^{2} \\ c {}^{4} - (2 - 2c) {}^{2} \\ c {}^{4} - (4 - 8c + 4c {}^{2} ) \\ c {}^{4} - 4c {}^{2} + 8c - 4$