find the factor of y^3+y^2+y+1
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Step-by-step explanation:f(y)=y³+y²+y+1=0
f'(y)=3y²+2y+1=0
=3y²+3y-y+1=0
3y(y+1)-1(y+1)=0
3y-1=0,y+1=0
y=1/3,y=-1
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