Question

a resposta da equacao x2+9x+8=0

Answer 1

Delta=b2-4.a.c delta=9^2-4.1.8 Delta=81-32 Delta=49 X=-b+ou-raiz de delta /2.a x=-9+ou-raiz de 49/2.1 X=-9+ou-7/2 X'=9+7/2=4 X''=9-7/2=1