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)
(5^2)/(x^2) = 4/12 // - 4/12
(5^2)/(x^2)-(4/12) = 0
(5^2)/(x^2)-1/3 = 0
25*x^-2 = 1/3 // : 25
x^-2 = 1/75
-2 < 0
1/(x^2) = 1/75 // * x^2
1 = 1/75*x^2 // : 1/75
75 = x^2
x^2 = 75 // ^ 1/2
abs(x) = 5*3^(1/2)
x = 5*3^(1/2) or x = -(5*3^(1/2))
x in { 5*3^(1/2), -(5*3^(1/2)) }
| (X+5)-(3X+8)=4X-9 | | -6(2t+3)=-42 | | -7+2(-9+6)=-1 | | (X^2-5)(3x+2)= | | 6x+11x=19 | | 6.75=3/4b | | 3(x-4)=3x-(2x+4) | | ((5×5)/(x×x))=(4/12) | | 9=2p+6 | | x^4+6n^3=0 | | f(1)=0.5(3-1) | | (2/5)x-(3/10)x=2 | | F=1/2e-5 | | 0.6a-0.16=0.3 | | 2x+56=112 | | X^7=52 | | (36)x(-4)= | | 2x+4=15-3x | | 7y-5y=20 | | 2(5x+3)+33=29 | | 3x+50=50 | | -4+2y=x | | f(0)/f(-1) | | x=0.5(3-x) | | x-(x*.023)=100 | | 2h=8g-12 | | -x+4x+2=8 | | f(0)/f(4)= | | -12+212=4(5x) | | 2log(a-10)=2 | | x=5x^2-1.5x+2 | | (-ab)^3/ab^3 |