SOLUTION: {{{x^2=21-sqrt((x^2)-9)}}}
For this problem I got this far...
x^2(x^2-43)+450=0
How would you factor this? Help me!
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Question 441085:
For this problem I got this far...
x^2(x^2-43)+450=0
How would you factor this? Help me!
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
For this problem I got this far...
x^2(x^2-43)+450=0
How would you factor this?
Write it:
x^4 - 43x^2 + 450 = 0
This will factor to
(x^2 - 18)(x^2 - 25) = 0
Four solutions
x^2 = 18
x = +/-
x = +/-
and
x^2 = 25
x = +/-
x = +/- 5
:
Check all solutions in the original equation
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