Which of the following occurs within the solution process for cube root of 5 x minus 2 minus cube root of 4 x is equal to 0 ?
Answer
A
squaring both sides twice
B
squaring both sides once
C
cubing both sides once
D
cubing both sides twice
Explanation
Add ∛(4x) to both sides to get ∛(5x − 2) = ∛(4x). Cube both sides once to remove the cube roots, giving 5x − 2 = 4x, so x = 2. The step used is cubing both sides once.
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