Пж Срочно!!!Спрости вирази. a) 7(a-2d)-3(a+d) = б) 2(x-1)+5(2-x) = в) 3x-(8x-5(2x-2)) = г) 6x-4-2(5x-11) = д) 6(x-2)(3x-12) = e) 5(3x+2)-2(6x-3) = ж) 9(2x-20)-6(3x-30)​

Ответ:

а) (7(a-2d)-3(a+d) = 4a - 17d)

б) (2(x-1)+5(2-x) = -3x + 8)

в) (3x-(8x-5(2x-2)) = 5x - 10)

г) (6x-4-2(5x-11) = -4x + 18)

д) (6(x-2)(3x-12) = 18x^2 - 72x + 36)

е) (5(3x+2)-2(6x-3) = 3x + 16)

ж) (9(2x-20)-6(3x-30) = 0)

Объяснение:

a) (7(a-2d)-3(a+d) = 7a - 14d - 3a - 3d = 4a - 17d

б) (2(x-1)+5(2-x) = 2x - 2 + 10 - 5x = -3x + 8

в) (3x-(8x-5(2x-2)) = 3x - 8x + 10x - 10 = 5x - 10

г) (6x-4-2(5x-11) = 6x - 4 - 10x + 22 = -4x + 18

д) (6(x-2)(3x-12) = 18x^2 - 72x + 36

e) (5(3x+2)-2(6x-3) = 15x + 10 - 12x + 6 = 3x + 16

ж) (9(2x-20)-6(3x-30) = 18x - 180 - 18x + 180 = 0