[latex] frac{x^2+3x-18}{x^2+8x+12}= frac{x^2-3x+6x-18}{x^2+6x+2x+12}= frac{x(x-3)+6(x-3)}{x(x+6)+2(x+6)}= frac{(x+6)(x-3)}{(x+6)(x+2)}= frac{x-3}{x+2} [/latex]

( x² + 3x - 18) / ( x² + 8x + 12) = ( x² - 3x + 6x - 18) / ( x² + 2x + 6x + 12)        = [( x² - 3x) + ( 6x - 18)] / [( x² + 2x) + ( 6x + 12)]        = [ x( x - 3) + 6( x - 3)] / [ x( x + 2) + 6( x + 2)]        = ( x - 3)( x + 6) / ( x + 2)( x + 6), se simplifica cu ( x + 6)        = x - 3 / x + 2 Sper ca ti-am fost de ajutor!