Question

8. Simplify the following expressions and find their values when a = -1, b = -2
2(a2 + ab) + 3 - ab.​

Answer 1

2(-1×2 + -1×(-2)) +3- (-1)×(-2)

2(-2+(-2)+3-(-2)

2(-2-2)+3+2

2(-4)+5

-8+5

= -3

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