If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( z )
z = 0
z = 0
z = 0
z in (-oo:0) U (0:+oo)
5/8 = 6/z // - 6/z
5/8-(6/z) = 0
5/8-6*z^-1 = 0
-6*z^-1 = -5/8 // : -6
z^-1 = 5/48
-1 < 0
1/(z^1) = 5/48 // * z^1
1 = 5/48*z^1 // : 5/48
48/5 = z^1
z = 48/5
z = 48/5
| 3+2x-4=13 | | 7-4p=3p-21 | | (17/7)/(13a/5a^3) | | p-16p= | | 53.45=38.50j | | 3x-21=72 | | 9-10f=-4f-7f+2 | | 2.68=4.5p | | X*2-3x=0 | | xy+9=0 | | 7x+3+5x=99 | | 44+.06x=35+.09x | | -25=-4+3(4x+5) | | h=4vt+18tsuqare | | 2.68p=4.5 | | 3=x/-3 | | 44+.06x=35+0.9x | | 10+3y=-20 | | 5(x-2)+10=(x+6)-3(x+2) | | 8y+7=6y+10 | | 35y+5=25 | | 2[4+8(4-3)]= | | 5=h-3 | | x=(2x+11)+(4x+5) | | (2-7i)(-1+4i)= | | sec^2x+secx-6=0 | | =(2-7i)(-1+4i) | | 26.2=3.5h | | -5-6w+5w=10w-5 | | x=(2+11)+(4x+5) | | (-6+-1x)(5+-1x)= | | 5w^2-39w+28=0 |