В) 3 (2-m) ^2+2 (2-m) ^2 д) 4 (3-5a) ^2-5 (a-3) (2a-3) е) (a+1) ^2+2 (a+1) - 3 (a-1) (a+1)

Упростим наиболее рациональным способом:

в) 3 (2 - m) ² + 2 (2 - m) ² = (2 - m) ² (3 + 2) = 5 (2 - m) ² = 5 * (4 - 4m + m²) = 20 - 20m + 5m²;

д) 4 (3 - 5a) ² - 5 (a - 3) (2a - 3) = 4 * (9 - 30a + 25a²) - 5a + 15 = 36 - 120a + 100a² - 5a + 15 = 100a² - 125a + 51;

е) (a + 1) ² + 2 (a + 1) - 3 (a - 1) (a + 1) = (a + 1) (a + 1) + 2 (a + 1) - 3 (a - 1) (a + 1) = (a + 1) (a + 1 + 2 - 3 (a - 1)) = (a + 1) (a + 1 + 2 - 3a + 3) = (a + 1) ( - 2a + 6) = a * ( - 2a) + a * 6 + 1 * ( - 2a) + 1 * 6) = - 2a² + 6a - 2a + 6 = - 2a² + 4a + 6.