SOLUTION: I don't know how to solve for t here: t^3 - 12 t^2 - 45 t + 56 Wolfram Alpha says t=1. It's so obvious, yet how did it get that answer? It doesn't show any steps. This is th

Algebra ->  College  -> Linear Algebra -> SOLUTION: I don't know how to solve for t here: t^3 - 12 t^2 - 45 t + 56 Wolfram Alpha says t=1. It's so obvious, yet how did it get that answer? It doesn't show any steps. This is th      Log On


   

Question 370360: I don't know how to solve for t here:
t^3 - 12 t^2 - 45 t + 56
Wolfram Alpha says t=1. It's so obvious, yet how did it get that answer? It doesn't show any steps. This is the question I couldn't get on my final exam. I tried typing it into the equation solver here but it didn't work...
Thanks for your help!
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The factors of 56 are 1, 2, 4, 7 & 8, try those first, both + and minus.
When one factor is found, it becomes a quadratic.
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