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^2-36 = 0
x^2-36 = 0
x^2-36 = 0
1*x^2 = 36 // : 1
x^2 = 36
x^2 = 36 // ^ 1/2
abs(x) = 6
x = 6 or x = -6
x in (-oo:-6) U (-6:6) U (6:+oo)
(x+6)/(x^2-36) = 0
x+6 = 0 // - 6
x = -6
x in { -6}
x belongs to the empty set
| y/2-6=0 | | y/2+6=0 | | 3x+27=13x-72 | | y/5-12=-1 | | 2x/x^2-7x-18=6x/x^2+x-2 | | y/5+12=-1 | | x^2-3=3 | | (x+a)(x+b)=23 | | 7x-3(7-x)=15 | | p=-0.01s^2+0.8s+3.7 | | X^4+3i=0 | | 5d-9=2d+6 | | 9x-2/20x+5 | | 3x+2+4x-7+2x+9= | | 3-5(2x+1)-2(x-4)=0 | | 12(4x-5)=4(12x+3) | | 57/8+20 | | f=9/7(n-47) | | 8x-x=33-5 | | 5m^2-28m-12=0 | | 11-7x=-19+3x | | 56-2x=-9x | | X^3+2x^2-16x=o | | 3(2x-5)-4x=2x+1 | | a/-7-7=5 | | 0.6x+4.6=3.7 | | 2t+8=-4(t+4) | | 2t+8=-4(t+4) | | K^2+10k-39=0 | | x+x-7(2)+x+2(2)=180 | | -9x-13=3x+11 | | v=n/g |