Ola Karina
x² - 4x/5 - 1/5 = 0
5x²/5 - 4x/5 - 1/5 = 0
5x² - 4x - 1 = 0
delta
d² = 16 + 20 = 36
d = 6
x1 = (4 + 6)/10 = 1
x2 = (4 - 6)/10 = -1/5
pronto
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Ola Karina
x² - 4x/5 - 1/5 = 0
5x²/5 - 4x/5 - 1/5 = 0
5x² - 4x - 1 = 0
delta
d² = 16 + 20 = 36
d = 6
x1 = (4 + 6)/10 = 1
x2 = (4 - 6)/10 = -1/5
pronto
http://codes4free.net/?ref=oBQyTVfQc