Question

please solve this question

Answer 1

HEY MATE HERE IS YOUR ANSWER

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Given the value of x

$x = \frac{1}{3} - \sqrt{8}$
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$= > {x}^{3} - 2 {x - 7x - 5}^{2}$

$= { \frac{1}{3} - \sqrt{8} }^{3} - 2( \frac{1}{3} - { \sqrt{8} }^{2} ) - 7( \frac{1}{3} - \sqrt{8} ) - 5$

$= \frac{1}{27} - \sqrt{8} - \frac{2}{9} - 8 - \frac{7}{2} - \sqrt{8} - 5$

$= \frac{1}{27} - \frac{2}{9} - \frac{7}{3} - \sqrt{8} - \sqrt{8} - 8$

$= \frac{1 - 18 -63 }{27} - \sqrt{8} - \sqrt{8} - 8$

$\underline = \frac{ - 80}{27} - \sqrt{8} - \sqrt{8} - 8$

Answer

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Answer 2

X=1/3 root 8
We will first solve this
X=0.9428090416
Now solve
0.0.9428090416×0.9428090416×0.9428090416-2×(0.9428090416×0.9428090416)-7×0.9428090416-5
The answer will be
=−12.53938859