Respuesta :

DariusX
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