resolva a equação x²-3x-4=0
2x-3x-4=0
2x-3x=0+4
1x=4
x=4
1
[tex] Delta b^2 -4.a.c (-3)^2-4.1.(-4) 9 + 16 25 Báscara -b +/- \sqrt{delta} / 2 3 +/- \sqrt{25}/2 3 +/- 5/2 x1 = 3+5/2 = 4 x2 = 3-5/2 = -1[/tex]
