SOLUTION: I need to solve the following equation by factoring: x^4-2x^2-3=0

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Question 720087: I need to solve the following equation by factoring:
x^4-2x^2-3=0
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E4-2x%5E2-3=0

Choose some variable, anything, v. Let v=x%5E2. Now solve first for v%5E2-2v-3=0. Can you factor the left member?

%28v%2B1%29%28v-3%29=0. What more should you do?