ClarisaKrasovec
ClarisaKrasovec
21-06-2015
Mathematics
contestada
x^2 - 4x - 77 = 0 Factor and check
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Аноним
Аноним
21-06-2015
x² - 4x - 77 = 0
( x + 7) ( x - 11)
x + 7 = 0
x - 11 = 0
x = -7
x = 11
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