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(QUICK please) What is x^{3}+4x=4?

 May 28, 2017
 #1
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x^{3}+4x=4x^2 I mean

 May 28, 2017
 #2
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Solve for x:
x^3 + 4 x = 4 x^2

Subtract 4 x^2 from both sides:
x^3 - 4 x^2 + 4 x = 0

Factor x from the left hand side:
x (x - 2)^2 = 0

Split into two equations:
(x - 2)^2 = 0 or x = 0

Take the square root of both sides:
x - 2 = 0 or x = 0

Add 2 to both sides:
Answer: | x = 2                     or                      x = 0

 May 28, 2017

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