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If x cubed = -8, what does x equal

User Clawoo
by
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2 Answers

9 votes

x^3 = -8

The cube root of 8 is 2 = 2 x 2 x 2 is 8.

But, the answer is negative, which means that the cube root of -8 must be -2.

-2 x -2 x -2 = -8

x = -2

Hope this helps!

User Shani Goriwal
by
4.8k points
11 votes

Let's start the sum as follows:

x³ = 8

X × X × X = 8

This means there are 3 number which after Multiplication gives answer 8.

If 2 is multtiplied 3 times it will give you 8

Thus the answer of x is 2

x = 2.

User Phong Vu
by
5.2k points