If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(2/2)*x+4/x = -3 // + 3
(2/2)*x+4/x+3 = 0
1*x^1+4*x^-1+3*x^0 = 0
(1*x^2+3*x^1+4*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2+3*x^1+4*x^0) = 0
x^1
x^2+3*x+4 = 0
x^2+3*x+4 = 0
DELTA = 3^2-(1*4*4)
DELTA = -7
DELTA < 0
x in { }
x belongs to the empty set
| 6xsquard-4x+1=0 | | 8(d-7)= | | 1/6+3/4y=4 | | -5x+7=9-5x-5(18/9(-3)+10) | | -12b+6b+2a= | | 7x+4=-3+2x+22 | | 5(2x-5)=42 | | -1+9=4b-1-3b | | 34+3d=157 | | c/4=9/8 | | -2+2(n+4)=(1+5n) | | 15=7-x | | (D^2-6D+9)y=e^2x | | -3(x^2-1)=27 | | 27x-18x^2=0 | | -51=5+7x | | h(t)=-16t^2+45t+5 | | 3a-5(4a+1)= | | 4-3=0.4-2y | | 5x-20=56-21x | | 3x+5=5x-(2x-5) | | 5+6x=2(3x+4)-3 | | -24(6)+4(6)= | | PT=5x+3 | | 3y-1z/2=z | | 4(x+24)=24 | | 3y-1z/2 | | 2c+1.33=-4+4c | | 3a+5=140 | | 51=-27+x | | 2.7=5.4y-8.1 | | x/2-1/8x=3/8 |