Wednesday

February 10, 2016
Posted by **pavleen** on Monday, March 14, 2011 at 7:28pm.

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- math -
**Brooke & Ashland**, Monday, March 14, 2011 at 7:41pm4x(x - 5) - 5x(x - 4) = -1

4x*x - 4x*5 - 5x*x - 5x*-4 = -1

4x^2 - 20x - 5x^2 + 20x = -1

-x^2 = -1

x^2 = 1

x = 1, x = -1

So the answer is x = 1 or x = -1.

I hope that helps! :)