Powers and Roots Practice Test 4

Question : 6 of 40

Marks: +1, -0

If the cube of a number is subtracted from thrice its cube, the result is 1,458. Find the number.

Solution:

Let the number be x.
Then,

3x^3 - x^3 = 1,458

2x^3 = 1,458

x^3 = 729

x = 9

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