Respuestas

2012-07-23T17:07:02+02:00

-4(3h+1)(-5h-2)=0

-4(-15h²-6h-5h-2)=0

60h²+24h+20h+8=0

60h²+44h+8=0 ---->simplifica /4

15h²+11h+2=0

h=[-11±√(121-120)]/30

h=(-11±1)/30

h1=-10/30=-1/3

h2=-12/30=-6/15