Respuestas

2013-09-12T14:49:38+02:00

(x+2) (x+4) = x^2 + (2+4)x + 8 = x^2 + 6x + 8

(x-7) (x-6) = x^2 - 13x + 42

(3x-2) (3x-3)  = 9x^2 + (-3x.3 -2.3x) + 6 = 9x^2 - 15x + 6

(2x+5) (2x-2) = 4x^2 + (-4+10)x - 10 = 4x^2 + 6x - 10