Question

if x - 1/x = 4, then evaluatex^2 + 1/x^2 and x^4 + 1/x^43

Answer 1

Answer:

1)18

2)322

Step-by-step explanation:

x-1/x=4

by squaring on both the sides

x^2+1/x^2-2(x)(1/x)=16

x^2+1/x^2=16+2

=18

again squaring both the sides

x^4+1/x^4+2(x^2)(1/x^2)=324

x^4+1/x^4=324-2

=322

hope it helps you..

Answer 2

Step-by-step explanation:

This is the correct answer for first part of the question