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)
2/x-8 > (9/8)*x-2 // - (9/8)*x-2
2/x-((9/8)*x)-8+2 > 0
(-9/8)*x+2/x-8+2 > 0
(-9/8)*x+2/x-8+2 = 0
2*x^-1-9/8*x^1-6*x^0 = 0
(2*x^0-9/8*x^2-6*x^1)/(x^1) = 0 // * x^2
x^1*(2*x^0-9/8*x^2-6*x^1) = 0
x^1
(-9/8)*x^2-6*x+2 = 0
(-9/8)*x^2-6*x+2 = 0
DELTA = (-6)^2-(2*4*(-9/8))
DELTA = 45
DELTA > 0
x = (45^(1/2)+6)/(2*(-9/8)) or x = (6-45^(1/2))/(2*(-9/8))
x = -4/9*(3*5^(1/2)+6) or x = -4/9*(6-3*5^(1/2))
x in { -4/9*(3*5^(1/2)+6), -4/9*(6-3*5^(1/2))}
(x+4/9*(3*5^(1/2)+6))*(x+4/9*(6-3*5^(1/2))) > 0
(-oo:-4/9*(3*5^(1/2)+6)) (-4/9*(3*5^(1/2)+6):-4/9*(6-3*5^(1/2))) (-4/9*(6-3*5^(1/2)):+oo) x+4/9*(3*5^(1/2)+6) - + + x+4/9*(6-3*5^(1/2)) - - +
x in (-oo:-4/9*(3*5^(1/2)+6)) U (-4/9*(6-3*5^(1/2)):+oo)
(-oo:-4/9*(3*5^(1/2)+6)) U (-4/9*(6-3*5^(1/2)):+oo)
| (2x+3y)dx+(x-2y)dy=0 | | x^2+9x-100=0 | | .32/6=k6/6 | | (2x+3y)dx+(2y-3x)dy=0 | | (x-30)+(2x+40)+2x=180 | | N-3(2n)=25 | | 4y=8+3(-1) | | 12=2(9-8)+59 | | 1.07(1.27)(5-x)=6 | | -13x+10x-5x= | | (x+1)(x-4)=1 | | 1-4x=-7+6x | | 7x^2-14x=-6 | | 2x+3=-28 | | 2/7x-10=4 | | (23/6)*24 | | 2/7-10=4 | | X^2+26+c=0 | | -3/11=k11/11 | | -4=4t+6 | | 2.5x+1.5y=131.5 | | 100=1/3(2x)5 | | 32(x^8)y+108(x^2)(y^4)=0 | | 23/6*24 | | 7/6/3 | | -9(v+2)+4v+5=5v+10 | | 2.5x+1.5=131.5 | | 8x^2+6x=112 | | 5b(b+15)=0 | | 1-3+5x=4-7x+4 | | 2x-5x+4=10 | | -9v(v+2)+4v+5=5v+10 |