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प्रश्न
Multiply: (2x + 5y + 6)(3x + y - 8)
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उत्तर
(2x + 5y + 6)(3x + y - 8)
⇒ 2x (3x + y - 8) + 5y(3x + y - 8) + 6 (3x + y - 8)
⇒ 6x2 + 2xy - 16x + 15xy + 5y2 - 40y + 18x + 6y - 48
⇒ 6x2 + 2xy + 15xy - 16x + 18x + 5y2 - 40y + 6y - 48
⇒ 6x2 + 17xy + 2x + 5y2 - 34y - 48
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