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x³-2x²-x+2 ajutorrrrrrrrr​

Răspuns :

Răspuns:

Explicație pas cu pas:

[tex]\displaystyle x^3-2x^2-x+2=x^2(x-2)-(x-2)=(x-2)(x^2-1)=\\=(x-2)(x-1)(x+1)[/tex]

x³-2x²-x+2→x³-2x²-x+2 => x²(x-2)-1(x-2) => (x²-1)(x-2)=> (x²-1²)(x-2) =>

Asta e form (a²-b² = (a+b)(a-b))

=> (x+1)(x-1)(x-2) =>(x+1)(x-1)(x-2)