If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( X )
(1-X)^2 = 0
(1-X)^2 = 0
(1-X)^2 = 0
1-X = 0 // - 1
-X = -1 // * -1
X = 1
X in (-oo:1) U (1:+oo)
2/((1-X)^2) = 0
2 = 0
X belongs to the empty set
X belongs to the empty set
| -6x-12=4x-92 | | -7(-4v+7)=119 | | (2+x)(y-3)=210 | | -11s=-176 | | 4.7=4.2y-3.2y-8.4 | | -5(3x-15)=2(x-5)-51 | | 3(2+5n)=126 | | X-15=3X+20 | | 12-3(1x-5)=21 | | -1/7x=-78 | | (-4x^3)*(x^4)=0 | | 3x-xy-2y+216=0 | | 1/x=0.01775 | | 6x+40=4x-30 | | (2x-1)/4=3x-5 | | (13-x)/4=(1-x)/2 | | -13+12=13x-13 | | 1/x=0.01754 | | 18/9x=24 | | 14p+17q+p-4q-7p= | | 62=10-10 | | (3x-7)2=0 | | 12x+15y=125 | | x*x*3-9*x-7=5*x-7 | | 6+9i=24 | | 12x+12=13x-12 | | 6m^2-4m+10=3m^2+7m-12 | | 1=33-2 | | 5-(x/2)=14 | | 6+9=24 | | 52=10w+2 | | 5x+153=11x-9 |