If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
3/4 = -6/m // + -6/m
3/4-(-6/m) = 0
6*m^-1+3/4 = 0
6*m^-1 = -3/4 // : 6
m^-1 = -1/8
-1 < 0
1/(m^1) = -1/8 // * m^1
1 = -1/8*m^1 // : -1/8
-8 = m^1
m = -8
m = -8
| X-3/y=x | | C=b-box | | PC+qx=r | | 5x^2-20x+8=0 | | -2(-3s+6s)=30-a | | (4x-7)=(2x+13) | | 1-4+3-7= | | -8x^2+10x-3=0 | | X-2x-2x-2=296 | | 17-20q=4(-13-5q) | | 0=x^3+x^2-16x-16 | | 5x-1=2+4x-1 | | 4G+3B=33 | | 0.24x+3.8=2.02 | | a^2+a-4/9 | | 136-4x=23x+19 | | (5x+12)= | | (3x+12)= | | 5x+13=2x+7 | | 3x+4x=-16 | | x^2+19xy+60y^2=0 | | x^2-27xy+26y^2=0 | | N+8.5=14.2 | | -8(y+3)=-13-4 | | x^2+7xy+12y^2=0 | | x^2-18xy+32y^2=0 | | 2+4x=-13 | | d^2+17+30=0 | | d^2-13d+36=0 | | 48=61x | | d^2-133d+36=0 | | d^2+14d+13=0 |