Question

Ajutor dau coroana
Descompuneti in factori :
a)abx - ax -x +bx
b) x^2 + 3x +4x +12

Answer 1

a)$abx-ax-x+bx=x(ab-a-1+b)=x(b*(a+1)-(a+1))$$=x(b-1)(a+1)$
b)$x^{2} +3x+4x+12= x^{2} +7x+12= x^{2} +4x+3x+12$$=x(x+4)+3(x+4)=(x+3)(x+4)$
Succes.