16Hit1600
Advanced MathEasy–MediumCubing a monomial

Advanced Math practice question

Which expression is equivalent to (2x²)³?

  1. A. 8x⁶Correct
  2. B. 6x⁶
  3. C. 8x⁵
  4. D. 2x⁶

Answer: A. 8x⁶

Cube both the 2 and the x²: 2³ = 8 and (x²)³ = x⁶.

Why the other answers are wrong

B. 6x⁶
6x⁶ multiplies 2 by 3 instead of cubing it.
C. 8x⁵
8x⁵ adds 2 + 3 for the exponent instead of multiplying.
D. 2x⁶
2x⁶ forgets to cube the 2.

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