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OpenStudy (anonymous):
Factor completely: x^2 − 4x + 9
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OpenStudy (anonymous):
complete the square. you have x^2-4x+4=9+4
OpenStudy (anonymous):
(x-2)^2=13
OpenStudy (anonymous):
x-2 = +-sqrt13 SO, x=2+sqrt13 or x=2-sqrt13
OpenStudy (anonymous):
you get to imaginary solutions 2+or - 1i squareroot of 5
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