Question

Розкрий дужки і спрости вирази: 1) a - (b - c + d) - c + (d + b - a) ; 2) - (a - b + c) - (d + b - a + c) + d ; 3) (a - b - c) - (a - d) + d - (b - c) 4) - (c - b - d) + a - (b + c) - (d - a)

Answer 1

Ответ:

Пошаговое объяснение:

1) a - (b - c + d) - c + (d + b - a) = a - b + c - d - c + d + b - a = -d

2) - (a - b + c) - (d + b - a + c) + d = -a + b - c - d - b + a - c + d = - 2c

3) (a - b - c) - (a - d) + d - (b - c) = a - b - c - a + d + d - b + c = -2b + 2d

4) - (c - b - d) + a - (b + c) - (d - a) = - c + b + d + a - b - c - d + a = 2a - 2c