SOLUTION: May I have some help with the following equation? Find all real solutions of the equation. x^8 + 15x^4=16

SOLUTION: May I have some help with the following equation? Find all real solutions of the equation. x^8 + 15x^4=16

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Question 121823: May I have some help with the following equation?
Find all real solutions of the equation.
x^8 + 15x^4=16
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
X^8+15X^4-16=0
(X^4+16)(X^4-1)=0
(X^4+16)(X^2+1)(X^2-1)=0
(X^4+16)(X^2+1)(X+1)(X-1)=0
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