Question 47
Algebraic ExpressionsGiven that p = x − 1/x and q = x2 + 1/x2, express q in terms of p.
- A.(p2 + 2)
- B.(p − 2)2
- C.(p + 2)2
- D.(p2 − 2).
Show the answer and explanation
Answer: A ((p2 + 2))
Explanation
p2 = x2 − 2 + 1/x2 = q − 2, so q = p2 + 2.