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Question
Factorize using the grouping method:
x2 + y2 + x + y + 2xy
Sum
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Solution
x2 + y2 + x + y + 2xy
= (x2 + y2 + 2xy) + (x + y) ...[As (x + y)2 = x2 + 2xy + y2]
= (x + y)2 + (x + y)
= (x + y)(x + y + 1)
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Factorisation by Grouping
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