Question

J1) a+(-b)-(-2a)-2b=E2) -a-(-a)+2b+(-b)=3) -a-(+3a)+(-b)-b​

Answer 1

Ответ:

1 правильная потому a+(-b)-(2a)-2b=100th

Answer 2

Let's simplify each expression step by step:

J1) a + (-b) - (-2a) - 2b

First, let's simplify the double negatives:

a + (-b) + 2a - 2b

Next, let's combine like terms:

(a + 2a) + (-b - 2b)

This simplifies to:

3a - 3b

So, J1 simplifies to 3a - 3b.

E2) -a - (-a) + 2b + (-b)

Again, let's simplify the double negatives:

-a + a + 2b - b

Next, let's combine like terms:

(-a + a) + (2b - b)

This simplifies to:

0 + b

So, E2 simplifies to b.

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

Here, the positive sign before 3a doesn't change anything, so we can remove it:

-a - 3a + (-b) - b

Next, let's combine like terms:

(-a - 3a) + (-b - b)

This simplifies to:

-4a - 2b

So, 3) simplifies to -4a - 2b.

To summarize:

J1) a + (-b) - (-2a) - 2b simplifies to 3a - 3b.

E2) -a - (-a) + 2b + (-b) simplifies to b.

3. -a - (+3a) + (-b) - b simplifies to -4a - 2b.