a) Add 8x2 + 7xy – 6y2 and 4x2 – 3xy + 2y2
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8x2 + 7xy – 6y2 + 4x2 – 3xy + 2y2
8x2+4x2+7xy-3xy-6y2+2y2
12x2+4xy-4y2
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