Question

${x}^{3} - 3 {x}^{2} - 9x - 5$
pls do this sum in your rough note and take a photo and send to me pls p​

Answer 1

∴ (x + 1), (x – 5) and (x + 1) are factors of given polynomial.

$→ {x}^{3} + {x}^{2} - {4x}^{2} - 4x - 5x - 5 \\ → {x}^{2} (x + 1) - 4x(x + 1) - 5(x + 1) \\ →(x + 1)( {x}^{2} - 4x - 5) \\ →(x + 1)( {x}^{2} - 5x + x - 5) \\ →(x + 1)(x - 5)(x + 1)$

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