Question

If x is equal to 5 minus 2 root 6, find x cube minus one upon x cube

Answer 1

Answer:

970

Step-by-step explanation:

x=5-2root6 then

1/x= 5+2root6

$by \: rationalising \: the \: dinominator$

x^3+1/x^3=(x+1/x)-3x×1/x(x+1/x)

=(5+2root6+5-2root6)^3-3(5+2root6+5-2root6)

=(10)^3-3×10

=1000-30

970

Answer 2

Answer:

hope it will help you

but try it ur self