# math

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x^2-6x-7=0 Completing the square

need help

• math -

what is half of -6 squared: 6/2=3, squared , 9

x^2-6x+9 -7=9
(x-3)^2 =16
take the square root of each side.
x-3= +-4
x=7, or -1

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