If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
(2*x+3)^2 = 0
(2*x+3)^2 = 0
(2*x+3)^2 = 0
2*x+3 = 0 // - 3
2*x = -3 // : 2
x = -3/2
x in (-oo:-3/2) U (-3/2:+oo)
(2*(x+1)*(x+2))/((2*x+3)^2) = 0
( x+1 )
x+1 = 0 // - 1
x = -1
( x+2 )
x+2 = 0 // - 2
x = -2
x in { -1, -2 }
| 2x^2+6x+4/4x^2+12x+9 | | -2x+1=-11 | | 0.5x+7y=-25 | | (-5)-(-37)-11= | | 0.20x+0.25(30)=23.5 | | 13x-55=180 | | 6x+7=8-13 | | 2z-2(3-4z)=6+2z | | f(5)=18x+11 | | 5-10=2x+12 | | h^3+3h^2+3h=7 | | 0.20+0.25(30)=23.5 | | 2x-8=3(3x-4) | | 4x+14+9x-15=12x+15 | | 1-6x=17-5x | | f^2-(4f-2f^2-8)=2f^2+4f-8 | | P^2-10p-3=8 | | (h/6)+12=(h/12)+24 | | (-14)+45-(-50)= | | r-9/5=-3 | | 45=-15t | | 0.50x+0.35(50)=48.5 | | 3m^2+5m=m^2-7m-18 | | x-3=2x+10 | | -12+8=4t | | -5-[(5-2)-(-8-6)]= | | 2=5(5z-2)-9(3x-2) | | 3.8-0.2x=87.6 | | 8-(-9)-6-3= | | x=5x^3-6x^2+2x-3 | | 3.9(8.2)+7.1(2.0)= | | (m^2)-(2m)-2=0 |