SOLUTION: solve, x^4-12x^2-45=0

Question 120029: solve, x^4-12x^2-45=0
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Let to get

Factor the left side (note: if you need help with factoring, check out this solver)

Now set each factor equal to zero:
or

or Now solve for w in each case

Remember, we let , so this means

or

Now take the square root of both sides in each case

or

Simplify

or

Now break up the plus/minus

, , or

So our answers are

, , or

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