Question

I need help completing the square for a quadratic equation. The equation is x^2-6x+5=0

Answer 1

Do you agree that `x^2-6x+5=0` is the same as `1x^2-6x+5=0` ?

all that changed was the x^2 turned into 1x^2

Answer 2

To complete the square, the 2nd degree term must be simply x^2.
If you have a number other than 1 multiplying the x^2 term, such as 2x^2, or 3x^2, you will need an extra step.
Here we do have just x^2.
To complete the square, take half of the coefficient of the x-term and square it.
In this case, the x-term is -6x.
The coefficient of the x-term is -6.
Take half of -6 and square it.
That is what you need to add to complete the square.