Question

if xsquare +1/xsquare=15 find the value of x cube -1/xcube
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Answer 1

Answer:

√17

Step-by-step explanation:

$x^{2} +\frac{1}{x^{2} }=15\\\\(x+\frac{1}{x} )^2=x^{2}+\frac{1}{x^{2} } +2\\\\(x+\frac{1}{x} )^2=15+2\\\\(x+\frac{1}{x} )^2=17\\\\(x+\frac{1}{x} )=\sqrt{17}$

Answer 2

Step-by-step explanation:

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