Respuestas

2012-12-16T21:17:00+01:00

. (x+3)² - 17 = (x+2)²

x2+6x+9-17=x2+4x+4

x2+6x-8=x2+4x+4

x2+6x-x2-4x=4+8

2x=12


x=12/2


x=6



2012-12-16T21:17:59+01:00

 (x+3)² - 17 = (x+2)²

x2+6x+9-17=x2+4x+4

x2+6x-x2-4x=4+8

2x=12

 x=12/2=6

x=6