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प्रश्न
Divide the polynomial f(x) = 3x2 – x3 – 3x + 5 by the polynomial g(x) = x – 1 – x2 and verify the division algorithm.
योग
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उत्तर
x – 2
`-x^2 + x - 1")"overline(-x^3 + 3x^2 - 3x + 5)`
–x3 + x2 – x
(+) (–) (+)
2x2 – 2x + 5
2x2 – 2x + 2
(–) (+) (–)
3
Thus, quotient = x – 2 and remainder = 3
Then, f(x) = g(x) × q(x) + r(x)
= (–x2 + x – 1)(x – 2) + 3
= –x3 + x2 – x + 2x2 – 2x + 2 + 3
= –x3 + 3x2 – 3x + 5
Hence Verified.
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