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प्रश्न
Find the sum of: 9x2 – 6x + 7, 5 – 4x and 6 – 3x2
उत्तर
9x2 – 6x + 7, 5 – 4x and 6 – 3x2
9x2 – 6x + 7 + 5 – 4x + 6 – 3x2
= 9x2 - 3x2 - 6x - 4x + 7 + 5 + 6
= 6x2 - 10x + 18
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