Question

Раскрыть скобки -(-a-b)+(-c-d) (a+b)+(-c+d) -(a-b)+(c+d)

Answer 1

1) a+b-c-d
2) a+b-c+d
3) -a+b+c+d

Answer 2

Sure, let's expand the expressions by applying the distributive property and simplifying the terms:

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

Expanding the first expression: -(a-b) + (c+d) = -a + b + c + d

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

Expanding the second expression: (a+b) + (-c+d) = a + b - c + d

3. -(-a-b) + (-c-d)

Expanding the third expression: -(-a-b) + (-c-d) = a + b - c - d

So, the expanded expressions are:

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