Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 167448: (3x+1)(x-1)= -3x: (3x+1)(x-1)= -3x
Answer by midwood_trail(310) About Me  (Show Source):
You can put this solution on YOUR website!
(3x+1)(x-1)= -3x
Start by multiplying both factors on the left side using FOIL.
3x^2 - 3x + x - 1 = -3x
3x^2 -2x - 1 + 3x = 0
3x^2 + x - 1 = 0
Use the quadratic formula to factor and find x.
Can you take it from here?