Posted by **Aisumi** on Wednesday, September 29, 2010 at 12:17pm.

Solve by completing the square x2 - 2x - 5 = 0. Help please

a)1 plus or minus√6

b)-1 plus or minus√6

c)-3 plus or minus 2√6

d)3 plus or minus 2√6

- Algebra help -
**bobpursley**, Wednesday, September 29, 2010 at 12:26pm
x^2-2x + ...=5

half of -2,then square it.

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

(x-1)^2=(sqrt6)^2

you finish.

- Algebra help -
**Aisumi**, Wednesday, September 29, 2010 at 1:11pm
i don't know how?(:<

- Algebra help -
**Jen**, Wednesday, September 29, 2010 at 1:32pm
(x-1)^2=sqrt6^2

Take the square root of both sides.

x-1=sqrt6..

you have to know how to finish from here

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