SOLUTION: Can you please help me solve this problem step by step? Find all zeros of f(x). f(x)=x4+5x2+4

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Question 59247This question is from textbook College Algebra with Modeling and Visualization
: Can you please help me solve this problem step by step?
Find all zeros of f(x).
f(x)=x4+5x2+4 This question is from textbook College Algebra with Modeling and Visualization

Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
SEE THE FOLLOWING EXAMPLE AND TRY.IF STILL I DIFFICULTY PLEASE COME BACK
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solve x^4-8x^2+7=0
X^4-X^2-7X^2+7=0
X^2(X^2-1)-7(X^2-1)=0
(X^2-1)(X^2-7)=0
(X-1)(X+1)(X-SQRT7)(X+SQRT7)=0
X=1..........OR
X=-1....OR
X=SQRT7........OR
X=-SQRT7