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