<PRE><B>Question 180701</B>
find all solutions of the equation algebraically. 

36t^4 + 29t^2 - 7 = 0 

36t^4 + 36t^2 - 7t^2 - 7 = 0


36t^2(t^2 + 1) -7(t^2+1) = 0

(t^2+1)(36t^2-7) = 0

t^2 = -1 or 36t^2 = 7

t = i or t = -i or sqrt(7)/6 or -sqrt(7)/6

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cheers,
Stan H.
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