factorise
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x + xy + y + 1
= x + 1 + xy + y
= (x + 1) + (xy + y)
= 1 (x +1) + y(x +1)
= (x + 1) ( 1+ y)
= (x + 1) (y + 1)
= x + 1 + xy + y
= (x + 1) + (xy + y)
= 1 (x +1) + y(x +1)
= (x + 1) ( 1+ y)
= (x + 1) (y + 1)
priya3075:
thanks
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