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38 votes
38 votes
Add 2 to both sides of the equation.

So, I have this half-done equation, and the next step is to add 2 to both sides, how do I do that? Please help with a legit answer, thankyou so much!
x^3=∛(x-2)

User Hasteq
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2.6k points

1 Answer

21 votes
21 votes

Answer:

x = -1.135 (approx).

Explanation:

x^3 = ∛(x - 2)

Cube both sides:

x^9 = x - 2

Subtract x and add 2 to both sides:

x^9 - x + 2 = 0

We could solve this for real roots by drawing a graph.

I did this and got one root x = -1.135 (approx).

The other 8 roots are complex.

User Alex Teut
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3.1k points