6+sqrt(5)-sqrt(5)=6
6*sqrt(5)*(-sqrt(5))=-30
6*sqrt(5)-6*sqrt(5)-5=-5
x^(3)-6x^(2)-5x+30=0
(x-6)(x+√5)(x-√5)=
(x-6)(x²-5)=
x³-5x-6x²+30=
x³-6x²-5x+30
6+sqrt(5)-sqrt(5)=6
6*sqrt(5)*(-sqrt(5))=-30
6*sqrt(5)-6*sqrt(5)-5=-5
x^(3)-6x^(2)-5x+30=0
(x-6)(x+√5)(x-√5)=
(x-6)(x²-5)=
x³-5x-6x²+30=
x³-6x²-5x+30