Question

1
If x +
4, find the value of
1)
1
x2
x +1/
x2
A) 16 B) 18 C) 14​

Answer 1

Answer:

Square both sides: [x + (1/x)]² = 4²

Rewrite as: [x + (1/x)][x + (1/x)] = 16

Use FOIL method to expand: x² + 1 + 1 + 1/x² = 16

Simplify: x² + 2 + 1/x² = 16

Subtract 2 from both sides: x² + 1/x² = 14

Answer: C

Answer 2

Answer:

first of all ask the question properly...