Question

-2(a+b-2)-a+2b-4. a=3,b=-1

Answer 1

Ответ:

Пошаговое объяснение:

-2а-2b+4-a+2b-4=-3a

то что выделено, взаимно уничтожаются

Answer 2

To evaluate the expression -2(a+b-2)-a+2b-4 when a=3 and b=-1, you can substitute the values of a and b into the expression and then simplify it step by step:

-2(a+b-2)-a+2b-4

Now, replace a with 3 and b with -1:

-2(3 + (-1) - 2) - 3 + 2(-1) - 4

Now, perform the operations inside the parentheses first:

-2(3 - 1 - 2) - 3 - 2 - 4

Now, simplify further:

-2(0) - 3 - 2 - 4

Since -2 times 0 is 0:

0 - 3 - 2 - 4

Now, perform the subtraction:

-3 - 2 - 4 = -5 - 4

Finally, subtract:

-5 - 4 = -9

So, when a=3 and b=-1, the expression -2(a+b-2)-a+2b-4 evaluates to -9.