Pls solve to these question attached above ....
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a)a^2 + 2ab + b^2 = -2^2 + 2 x -2 x 3 +3^2 = -4+ (-12) +9 = -4 - 12 +9 = -16 + 9 = -7
b)a^2 - 2ab + b^2 = -2^2 - 2 x -2 x 3 + 3^2 = -4 - (-12) +9 = -4 + 12 + 9 = -4 + 21 = 17
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