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 = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
4*x+2/x-2 = 9 // - 9
4*x+2/x-9-2 = 0
4*x^1+2*x^-1-11*x^0 = 0
(4*x^2-11*x^1+2*x^0)/(x^1) = 0 // * x^2
x^1*(4*x^2-11*x^1+2*x^0) = 0
x^1
4*x^2-11*x+2 = 0
4*x^2-11*x+2 = 0
DELTA = (-11)^2-(2*4*4)
DELTA = 89
DELTA > 0
x = (89^(1/2)+11)/(2*4) or x = (11-89^(1/2))/(2*4)
x = (89^(1/2)+11)/8 or x = (11-89^(1/2))/8
x in { (11-89^(1/2))/8, (89^(1/2)+11)/8}
x in { (11-89^(1/2))/8, (89^(1/2)+11)/8 }
| A=640s | | ln(x+25)=ln(x)+ln(25) | | 7=+8-12 | | 2c-5=3d+11 | | 20+3x+5+2x+5=180 | | 12x-9y=6 | | -2y=-x+8 | | (40+x)/(80+x)=0.60 | | 12-7x=17-4x | | 12-7x=0-4x | | 20-4(3)= | | 16/340= | | 4x+17=99x-17 | | 4x+17=8-9x | | 5x+10=8-9x | | 5x+10=8-4x | | 12.10/3 | | y=88-3x | | 3x+12=3x-3 | | n-6/-4=6 | | 7-5/8z=-23 | | 4x+64=9x | | x/-7+10=7 | | 5.8x-1=4.8 | | 4a^2+26a+12=0 | | x-5/6=4/3 | | x-8.4=-3.9 | | 2(2-4x)=25 | | 5+n/4.2=-4 | | -12/7+a=48 | | 7x+11=127+x | | 35(12+d)=2170 |