Respostas

2014-03-24T23:34:03-03:00
4x²-4x-24=0
a= 4; b= -4; c= -24

Δ=b²-4ac
Δ=(-4)² - 4.4.(-24)
Δ=400

x= -b +/-√Δ/2a
x= -(-4)+/-√400/2.4
x= 4 +/- 20/8
x'= 4+20/8
x'=3

x''=4-20/8
x''=-2

Xv=-b/2a
Xv=-(-4)/2.4
Xv=4/8
Xv=0,50

Yv= -Δ/4a
Yv=-400/4.4
Yv=-25

Y=C
Y= -24