Question

Вариант 1.1) (a- b) + (c- d); 2) - (- a + b) - (- c - d); 3) (a + b) – (c + d); 4) – (a + b) + (- c - d); 5) – (a - b) – (c + d) Вариант2.1) (a - b) - (c - d); 2) - (- a - b) + (- c - d); 3) (a + b) + (- c + d); 4) – (a - b) + ( c - d); 5) – (a + b) – (c + d)

Answer 1

1) (a- b) + (c- d)= а-b+c-d;//// 2) - (- a + b) - (- c - d)= a-b+c+d;//// 3) (a + b) – (c + d)= a+b-c-d;//// 4) – (a + b) + (- c - d)= -a-b-c-d;/// 5) – (a - b) – (c + d)=-a+b-c-d;//// Вариант2. 1) (a - b) - (c- d)=a-b-c+d;/// 2) - (- a - b) + (- c - d)= a+b-c-d;/// 3) (a + b) + (- c + d)= a+b-c+d;//// 4) – (a - b) + ( c - d)= -a+b+c-d;//// 5) – (a + b) – (c + d)= -a-b-c-d