factorise : 7x² + 48 xy -7y²
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Answer:
7x2 + 48xy-7y2
=7x2 + 49xy-xy-7y2
=7x(x + 7y)-y(x + 7y)
=(7x-y)(x + 7y)
∴ the factors of 7x2 + 48xy-7y2 are (7x-y)(x + 7y)
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