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OpenStudy (anonymous):
x^(2) +x+4=0
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OpenStudy (anonymous):
-x²+4x-4=0 x²-4x+4=0 (x-2)(x-2)=0 x=2
Directrix (directrix):
x^(2) +x+4=0 Root are not 2 and 2 but (-1/2) ± (i/2) √15
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