Question

if X square + 1 upon x square equals to 7, find x cube plus one upon x 3​

Answer 1

Step-by-step explanation:

x²+1/x²+2=(x+1/x)²

we get

x+1/x=3 or -3

x³+1/x³+3(x+1/x)=(x+1/x)³

x³+1/x³=3³-3×3

=18 or -36