Question

if a is equal to 2 and b is equal to minus 2 find the value of a square + a b + b square

Answer 1

heya,
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a = 2
b = -2
so,
a²+b²+2ab = (2)²+(-2)²+2(2)(-2)
                   = 4 + 4 - 8
                   = 8 - 8
                   = 0
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hope this helped u,
cheers³ :))