SOLUTION: Solve. (Enter your answers as a comma-separated list.) t^4-13t^2+42=0

Question 1058312: Solve. (Enter your answers as a comma-separated list.)
t^4-13t^2+42=0
Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.
Solve. (Enter your answers as a comma-separated list.)
t^4-13t^2+42=0
~~~~~~~~~~~~~~~~~~~~

 = .

Factor the left side

 = .

This equation deploys in two independent equations:


1.   =   --->   = 6  --->  t = +/-

and

2.   =   --->   = 7  --->  t = +/-.


Answer.  The solutions of the original equation are , , , and .

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