From the sum of xsquare – 2xy + ysquare and 2xsquare + 3xy –3ysquare subtract 3xsquare – xy + ysquare
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Step-by-step explanation:
3x + 7x = (3 + 7) x = 10x
(ii) -5xy + 9xy = (-5 + 9)xy = 4xy
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