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प्रश्न
Factorise the following:
x2y2 + 15xy - 16
योग
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उत्तर
x2y2 + 15xy - 16
= x2y2 + 16xy - xy - 16
= xy(xy + 16) - 1(xy + 16)
= (xy + 16)(xy - 1).
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