Question

If x-1/x=3, then x^4-1/x^4=

Answer 1

$answer = \: - 15$

$\frac{x - 1}{x} = 3$

3x=x-1

3x-x=-1

2x=-1

x=-1/2

x=-0.5

$\frac{ {x}^{4} - 1 }{ {x}^{4} }$

= -0.5*4-1/-0.5*4

= 0.0625-1/0.0625

=−0.9375/0.0625

=-15

hope this helps you.