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 = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
X^2*(36/(x^2)) = 36 // - 36
X^2*(36/(x^2))-36 = 0
36*X^2*x^-2 = 36 // : 36*X^2
x^-2 = X^-2
-2 < 0
1/(x^2) = X^-2 // * x^2
1 = X^-2*x^2 // : X^-2
1/(X^-2) = x^2
x^2 = 1/(X^-2) // ^ 1/2
abs(x) = 1/(X^-1)
x = 1/(X^-1) or x = -(1/(X^-1))
x in { 1/(X^-1), -(1/(X^-1)) }
| 8x^2-9x-j=0 | | 1.25*r-5.99=20.99 | | 4lnx-lnx^4=0 | | (6x+8y-9)(-xy)= | | (3/4)*5*5*5*5*5= | | 3-x=1/4(7-x)-1/3(2x-3) | | (3/4)5= | | 36r^3s^4-8r^4s^3-2r^5s^2/4r^2s | | 4(x-1)-2(11-2x)=3x+4 | | 72/1.2 | | 3x+6=-5-2x-6 | | 3x^3+46x^2+256x+960=0 | | 35*2=x | | -3x+2y=-24 | | 6x^3+9x^2=42x | | 6x^3+9x^2=42x | | 9/2=x | | 5/9x+1/8 | | y-5=2y+1 | | n/4-3=4 | | 35*2x=x | | 1/3(9-y)=y+1 | | 6x^3+9x^3=42x | | 5x^2+60x+172=0 | | x^12=1.12 | | (y-4)(y+7)=0 | | b(3b-4)=0 | | 3x^3+13x^2+4x=0 | | 1.12=x^12 | | -4y+6=-18 | | 4n(n+8)=0 | | 10n^2-9=5n |