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Sa se determine ordinul de multiplicitate al radacinii a= -5 a polinomului : P(X) =X^2+10X+25
b) P(X)=X^3 + 15X +75X+125


Răspuns :

[tex]a)P(X) =X^2+10X+25=(x+5)^2=(x+5)\cdot(x+5)\\ x=-5~are ~ordinul~de~multiplicitate~2.\\ b)P(X)=X^3 + 15X^2 +75X+125=x^3+3\cdot x^2\cdot5+3\cdot x\cdot5^2+5^3=\\ =(x+5)^3=(x+5)\cdot(x+5)\cdot(x+5)\\ x=-5~are ~ordinul~de~multiplicitate~3\\[/tex]