Question

(X+2).(x-1).(x+3)
como faco essa ?

Answer 1

(x+2). (x-1). (x+3) x^2-x+2x-2(x+3) x^3+3x^2-x^2-3x+2x^2+6x-2x-6 x(x+3)-x^2-3x+2x^2+6x-2x-6 x^2+3x-x^2-3x+2x^2+6x-2x-6 x^2-x^2+2x^2+6x-2x-6 2x^2+6x-2x-6 2x^2+4x-6=0 delta=b^2-4ac delta=4^2-4.2. (-6) delta=16+48 delta=64 x=-b-/+ raiz de delta/2a x=-4-8/2.2 x=-12/4 x=-3 x=-4+8/2.2 x=4/4 x=1