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^-4*((x^6)/9) = 0
x = 0
x = 0
x^-4*((x^6)/9) = 0
x^-4*((x^6)/9) = 0
1/9*x^2 = 0 // : 1/9
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
((x^-4*((x^6)/9))^-1)/2 = 0
9/2*x^-2 = 0 // : 9/2
x^-2 = 0
x naleu017Cy do O
x belongs to the empty set
| 1122334455667788991010+9999998888877777666677755544555334421= | | -3-1/6 | | X^2+y^2-8x+4y-16=0 | | r+2s/2=6+t | | R-7/1/4=11/6/28 | | Y-2/4/5=9/3/20 | | -9c+4=-32 | | Y-2/4/5=9/3/29 | | 5-9c+4=-32 | | 7b^2-23b-20= | | X-1/3=7/9 | | 3-2x+7=15+3x | | 3/4=b-2/3 | | G-4.5=10.1 | | -3x=18-(-12) | | 5(3x-1)/(7+2)=35 | | -8-(-6)=x/7 | | (5x-7)=7 | | 5x+1=75 | | 5(3x-1/7+2)=35 | | 2-x=21 | | M-1/3=4/9 | | 16-2(a+b)= | | 4(2c-1)-5=4c+7 | | -15x=35 | | 32/15=x/9 | | x-12/3-x=x+8/x+12 | | M-1/6=11/18 | | 4t-5=5(t+2) | | 4x-4=4x-4 | | 6.6=w-1.7 | | 49y=8(6y-4) |