SSAT Math Question 217: Answer and Explanation
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Question: 217
1.
- A. (x2)
- B. x24
- C. x5
- D. x2
Correct Answer: A
Explanation:
The answer is A
To simplify a cube root, find any cubes and remove them. x3 appears twice within x8, so you can pull out x2. There will still be two x values under the root, so leave x2 there: (x2).
You can expand the expressions out. x8 becomes (x)(x)(x)(x)(x)(x)(x)(x). As we are dealing with cubes, combine the x terms to (x3)(x3)(x2). Therefore, there are two cubes to remove from the cube root (each one becoming x), and x2 is left behind. Outside of the radica