Respuesta :

ashish4112119

answer:

+16

steps:

number without the x should be 9

number without the x should be 9c to be 9 needs +16

https://brainly.com/question/10668383

divide the number next to the x by 2

-6 divided by 2 is -3

find the square

-3 squared is 9

number without the x should be 9

x²-6x=7

make the equation = 0

x²-6x-7=0

a is the number next x²

b is the number next to x

c is the number without the x

c has to be 9

c is -7

c to be 9 needs +16

x²-6x+9 =0

x²-6x+(-3)² =0

(x-3)²

devishri1977

Answer:

9

Step-by-step explanation:

Completing the square  is a method used to solve the quadratic equation.

  •  Divide the co efficient of  'x' by 2.

        Coefficient of x is '6'. 6 ÷ 2 = 3

  •  Square the quotient of  (x ÷ 2)  and add to the both side of the equation.

       3² = 9

            x² - 6x + 9 = 7 + 9

Answer: To make into a perfect square, 9 must be added.

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