Question

What is the right form?

Answer 1

When we answer a question, the hope is always that you will learn something. Even if you don't we hope you can, at least, copy the steps using different numbers as may be required. See brainly.com/question/8683122.

1) subtract the constant (23)
.. x^2 -10x = -23

2) determine the coefficient of the x term (-10)
3) figure the value of half that (-5)
4) compute the square of that value ((-5)^2 = 25)
5) add that square
.. x^2 -10x +25 = 2

6) rewrite the left side as a square (you have chosen the correct form)
.. (x -5)^2 = 2

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To solve,
7) take the square root of both sides of the equation.
.. x -5 = ±√2

8) add the opposite of the constant on the left
.. x = 5 ±√2