Plz help me out with this question. Solve x^2-4x-6=0. It has to be a non calculator method. Thanks.

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- Apr 22nd 2006, 04:42 PMdigideensQuadratics help
Plz help me out with this question. Solve x^2-4x-6=0. It has to be a non calculator method. Thanks.

- Apr 22nd 2006, 05:36 PMticbolQuote:

Originally Posted by**digideens**

x^2 -4x -6 = 0

x^2 -4x = 6

x^2 -4x +(-4/2)^2 = 6 +(-4/2)^2

x^2 -4x +4 = 6 +4

(x-2)^2 = 10

Take the square roots of both sises,

x-2 = +,-sqrt(10)

So,

x = 2 +sqrt(10)

or,

x = 2 -sqrt(10) - Apr 23rd 2006, 02:30 PMdigideens
Thanks a lot, it really helped me out.