factorisation of (X+y)(2x+3y)-(X+y)(X+1
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Answer:
x^2 + 4xy + 3y^2 - x - y
Step-by-step explanation:
(X+y)(2x+3y)-(X+y)(X+1)
= (2x^2 +5xy +3y^2 )- ( x^2+x+xy+y)
= x^2 + 4xy +3y^2 - x - y
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