Please help

Solve x2 − 12x + 5 = 0 using the completing-the-square method.
x = six plus or minus the square root of five
x = negative six plus or minus the square root of five
x = six plus or minus the square root of thirty one
x = negative six plus or minus the square root of thirty one

Question

Please help

Solve x2 − 12x + 5 = 0 using the completing-the-square method.
x = six plus or minus the square root of five
x = negative six plus or minus the square root of five
x = six plus or minus the square root of thirty one
x = negative six plus or minus the square root of thirty one

anonymous · Answer

The answers should look like https://gyazo.com/872a0909fd0d54eba579498515313f6f the one with the answer is my best guess

jadedry · Answer

$$x^2 - 12x  + (12/2)^2 = -5 + (12/2)^2$$

= $$x^2 -12x + 36 = 31$$

= $$(x-6)^2 = 31$$

=$$x-6 = \pm \sqrt31 $$

therefore

$$x = 6 \pm \sqrt 31$$

anonymous · Answer

Oh thank you very much!

jadedry · Answer

@AntiFox 

No problem! c: