Question

Solve by completing the square:
x^2-12x-5=0

Answer 1

I know that you add 5 so it would be:
x^2-12x+_c_=5
Then I dont know how to find C?

Answer 2

x^2-12x-5=0
x^2-12x=5 Move the number(without the variable) over to the other side.

Answer 3

take half of 12x, and square it

Answer 4

Then to find C I half 12 then square it and that would be 36 right?

Answer 5

x^2-12x+36=41

Answer 6

SO: (x-6)^2=square root of + or-41

Answer 7

hmmm usually you'd want to group the "x" terms or like-terms

Answer 8

36 + -12x + x^2 = 41
Factor a perfect square on the left side
(x + -6)(x + -6) = 41

Answer 9

i think you're on the hang of it