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प्रश्न
Solve:
(3x + 2y)(7x − 8y)
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उत्तर
(3x + 2y)(7x − 8y)
= 3x (7x − 8y) + 2y(7x − 8y)
= 21x2 − 24xy + 14xy − 16y2
= 21x2 − 10xy − 16y2
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