SSAT Math Question 227: Answer and Explanation
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Question: 227
1. Simplify the variable expression: (–2x2y5)3
- A. –2x5y8
- B. –2x6y15
- C. –6x6y15
- D. –8x6y15
Correct Answer: D
Explanation:
The answer is D
The power applies to everything within the parentheses. A negative number raised to an odd power yields an odd result: (-2)3 = -8. When exponential expressions are raised to a power, multiply the exponents. Thus, (x2)3 = x6, and (y5)3 = y15.