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)
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
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