^-степеньа) z^3-121z=z(z^2-121)=z(z-11)(z+11)б)20t^3+20t^2+5t= 5t(4t^2+4t+1)=5t(2t+1)^2в)z^4-27zy^3=z(z^3-27y^3)=z(z-3y)(z^2+3zy+9y^2) г)t^2-y^2-2y=(t-y)(t+y)-2y
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^-степень
а) z^3-121z=z(z^2-121)=z(z-11)(z+11)
б)20t^3+20t^2+5t= 5t(4t^2+4t+1)=5t(2t+1)^2
в)z^4-27zy^3=z(z^3-27y^3)=z(z-3y)(z^2+3zy+9y^2)
г)t^2-y^2-2y=(t-y)(t+y)-2y