Rapid + explicatie dau coroana
x•(x+1)-x-1= descompunere in factori !


Răspuns :

x(x+1)-x-1=
= x(x+1)-(x+1)
=(x+1)(x-1)




Sper ca te-am ajutat

x•(x+1)-x-1


[tex]\it x\cdot(x+1)-x-1=x\cdot(x+1)-(x+1) = (x+1)(x-1)[/tex]