Question 25
Algebraic ExpressionsEvaluate x2(x2 − 1)−½ − (x2 − 1)½
- A.(x2 − 1)½
- B.(x2 − 1)
- C.(x2 − 1)−1
- D.(x2 − 1)−½
Show the answer and explanation
Answer: D ((x2 − 1)−½)
Explanation
Write both terms over (x2 − 1)½: [x2 − (x2 − 1)]/(x2 − 1)½ = 1/(x2 − 1)½ = (x2 − 1)−½.