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प्रश्न
Evaluate: (8 - 12x + 7x2 - 6x3)(5 - 2x)
बेरीज
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उत्तर
(8 - 12x + 7x2 - 6x3)(5 - 2x)
= 5(8 - 12x + 7x2 - 6x3) - 2x (8 - 12x + 7x2 - 6x3)
= 40 - 60x + 35x2 - 30x3 - 16x + 24x4 - 14x3 + 12x4
= 40 - 60x - 16x + 35x2 + 24x4 - 30x3 - 14x3 + 12x4
= 40 - 76x + 59x2 - 44x3 + 12x4
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