Question

Simplify the expression 2a - 2b - 4 + a and find its value when a= -1 and b= -2
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Answer 1

Step-by-step explanation:

2a-2b-4+a

3a-2b-4

value=3×-1-2×-2-4

-3+4-4

-3

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Answer 2

2a - 2b - 4 + a = 0

2a - 2b + a = 4

2a + a - 2b = 4

3a - 2b = 4

Now, on putting a = -1 and b= - 2, we get

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

-3 - (-4) = 4

-3 + 4 = 4

= -5