Question

D] Simply and find the value of the expression for a= -1 and b = 2
2a2 + 2ab - a2 + b2

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Answer 1

Step-by-step explanation:

a=-1 b = 2

2×(-1)×2+2×(-1)×2-(-1)×2+2×2

-2×2+(-2)×2+1×2+2×2

-2×2-2×2+1×2+2×2

-4-4+2+4

-8+2+4

-6+4

-2

ans = -2

Answer 2

Answer:

-2

Step-by-step explanation:

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