Factorise 2x²-3xy-2y²=7.
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Step-by-step explanation:
2x²−3xy−2y² =7
⇒2x² −4xy+xy−2y² =7
⇒2x(x−2y)+y(x−2y)=7
⇒(2x+y)(x−2y)
=7×1
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