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Which polynomial is to be subtracted from x2 + 13x + 7 to get the polynomial 3x2 + 5x – 4? |
Answer» Let the required polynomial be A. ∴ (x2 + 13x + 7) – A = 3x2 + 5x – 4 ∴ A = (x2 + 13x + 7) – (3x2 + 5x – 4) = x2 + 13x + 7 – 3x2 – 5x + 4 = x2 – 3x2 + 13x – 5x + 7+4 = -2x2+ 8x + 11 ∴ – 2x2 + 8x + 11 must be subtracted from x2 + 13x + 7 to get 3x2 + 5x – 4 |
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