Respostas

2013-11-18T17:55:54-02:00
9 x^{2} -7 x^{2} +4x-24+18=0
2 x^{2} +4x-6=0

delta= b^{2} -4(a)(c)
delta=16-4(2)(-6)
delta=16+48
delta=64

x= -b+/- \sqrt{delta} /2a
x= -4+/- \sqrt{64} /2(2)
x= -4+/-8/4
x1=4/4= 1
x2=-12/4= -3