2х^3-50=0
2x^3=50
x^3=50/2
x^3=25
x=∛25
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16x^3+8x^2+x=0
x(16x^2+8x+1)=0
x=0 или 16x^2+8x+1=0
(4x+1)^2=0
4x+1=0
4x=-1
x= -1/4
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x^3+2x^2-36x-72=0
x^2(x+2)-36(x+2)=0
(x^2-36)(x+2)=0
x^2-36=0 или x+2=0
x^2=36 x=-2
x=+ - 6