Question

$(x {}^{3} - 2x - 1) {}^{5}$
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Answer 1

SOLUTUON :-

$(x {}^{3} - 2x - 1) {}^{5}$

$5 {x}^{3} - 10x - 5 \: \: = \: \: 0 \\ \\ {5x}^{3} - 10x \: \: = \: \: 5 \\ \\ 5 {x}^{2} \: \: = \: \: 5 \\ \\ {x}^{2} \: \: = \: \: \frac{5}{5} \\ \\ {x}^{2} \: \: = \: \: 1$

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