Question

Descopusa in factori expresia a la a trea - a la a doua - a + 1 este ? Va rog repede , ms dau coroana!

Answer 1

a³-a²-a+1=a²(a-1)-(a-1)=(a-1)(a²-1)=(a-1)(a-1)(a+1)=(a-1)²(a+1)

Answer 2

 $\it a^3-a^2-a+1=(a^3-a)-(a^2-1)=a(a^2-1)-(a^2-1)= \\\;\\ =\it(a^2-1)(a-1)=(a+1)(a-1)\it(a-1)=(a+1)(a-1)^2$