landonsmith87
landonsmith87
03-05-2017
Mathematics
contestada
6y^3-150y............... x^3-10x^2+21x
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DariusX
DariusX
03-05-2017
6y^3-150y=0 / : y
6y^2-150=0
y^2=150/6
y^2=25
y1=5
y2=-5
x^3-10x^2+21x=0 / : x
x^2-10x+21=0
D=(-10)^2 - 4*1*21 = 100 - 84 = 16
x1 = (10 + 4)/2*1 = 7
x2 = (10 - 4)/2*1 = 3
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