SOLUTION: x^4-3x^2-10=0 solve by making the appropriate substitution.

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Question 4385: x^4-3x^2-10=0 solve by making the appropriate substitution.
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
Same as problem #4386. How about I solve it in an easier way! Just factor it, instead of making a substitution!!

x%5E4+-+3x%5E2+-+10+=+0
%28x%5E2+-+5%29%28x%5E2+%2B+2%29=0
x%5E2+-+5+=+0 or x%5E2+%2B+2=0
x%5E2+=+5 or x%5E2+=+-2
x+=+sqrt+%285%29, x=+-sqrt+%285%29, x=+sqrt+%28-2%29 , x=-sqrt+%28-2%29
x+=+sqrt+%285%29, x=+-sqrt+%285%29, x=+i%2Asqrt+%282%29 , x=-i%2Asqrt+%282%29

R^2 at SCC