Question

if a=1-√2 find the value of a^3-1/a^3​

Answer 1

Step-by-step explanation:

a=a-√2

to find value of =a^3-1/a³

=a^3-1×a^-3

since base are same, then

=a^-1

=1/a

=1/a-√2

=(a+√2)/a²-2 (by rationalise)