SOLUTION: find the real number solutions for the equation 3x^4+15^2-72=0

Question 272153: find the real number solutions for the equation
3x^4+15^2-72=0
Found 2 solutions by Alan3354, oberobic:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
3x^4+15^2-72=0

x^2 = - 8
x = � 2*i*sqrt(2) (complex numbers)
----------------
x^2 = 3
x = � sqrt(3) (real numbers)

Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
I assume the problem is to solve:

.
Factoring, we arrive at:

.
Real solutions will be found where

or

.

or

.

There are no real solutions for this part.
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