Question
Thu December 06, 2012 By:

Help this equation by showing each step?

Expert Reply
Thu December 06, 2012
Let x2 = t
The equation becomes
t2 - 31t - 180 = 0
(t + 5) (t - 36) = 0
t = -5, t = 36
 
Therefore, we have:
x2 = -5 This equation will not give us a real value of x.
x2 = 36 This gives x = 6 or -6.
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