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Robert
Mathematics
22 January, 19:21
6y^3-150y ... x^3-10x^2+21x
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Jaeden Frye
22 January, 19:45
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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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