Answers

2014-06-16T23:16:59+08:00
(x-4)^2 -25=0
(x-4)^2 = 25
sqrt(x-4)^2 = sqrt 25
x-4=5 and -5

x-4=5
x=9

x-4=-5
x=-1

(-1,9)

:)

1 1 1
2014-06-17T18:33:37+08:00
(x-4)²-25=0
(x-4)²=25
x-4=√25
x-4=+-5

x=5+4
x=9

x=-5+4
x=-1

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