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)
3/x = x-4 // - x-4
3/x-x+4 = 0
3*x^-1-1*x^1+4*x^0 = 0
(4*x^1-1*x^2+3*x^0)/(x^1) = 0 // * x^2
x^1*(4*x^1-1*x^2+3*x^0) = 0
x^1
4*x-x^2+3 = 0
4*x-x^2+3 = 0
DELTA = 4^2-(-1*3*4)
DELTA = 28
DELTA > 0
x = (28^(1/2)-4)/(-1*2) or x = (-28^(1/2)-4)/(-1*2)
x = (2*7^(1/2)-4)/(-2) or x = (-2*7^(1/2)-4)/(-2)
x in { (2*7^(1/2)-4)/(-2), (-2*7^(1/2)-4)/(-2)}
x in { (2*7^(1/2)-4)/(-2), (-2*7^(1/2)-4)/(-2) }
| 7mn+2mn-2mn= | | 1/2x=2/3-15 | | 3x^3+10x^2+15x+4=0 | | 8a-3=7a-5 | | 0.5d^3-d-36=0 | | 4y-1y+4=-5 | | x/4=3/2 | | ln(x^3+y^4)-z=0 | | x/3=11/6 | | 8(x+12)=14x+30 | | X^2-80x-800=0 | | 1.5x(1/30)=1.2^x-1 | | 9(7x-12)=8 | | x^0.7/x | | ln(x)+ln(x+3)=3ln(2) | | ln(x+3)=3ln(2) | | 30=(20^2sin2x)/9.8 | | 8x*6y= | | 30=(20^2sin2x)/9.8^2 | | a(x+2)-x-2= | | -2/7x−5/6=-2/3 | | 2x*x+5x-10=0 | | A+(bx^2)=x | | x^2=5y-8 | | 180=5000(0.02)(x) | | 7x^2=5.6 | | W^2-w=20 | | 2.50x=18 | | 144-4x=23x+15 | | 1-8x+2c+3c-9x+10= | | 4x^3+8x^2-16x=4x | | 18*2.50x=200 |