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^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
7/x+8/(x^2) = 0
7*x^-1+8*x^-2 = 0
t_1 = x^-1
8*t_1^2+7*t_1^1 = 0
8*t_1^2+7*t_1 = 0
DELTA = 7^2-(0*4*8)
DELTA = 49
DELTA > 0
t_1 = (49^(1/2)-7)/(2*8) or t_1 = (-49^(1/2)-7)/(2*8)
t_1 = 0 or t_1 = -7/8
t_1 = -7/8
x^-1+7/8 = 0
1*x^-1 = -7/8 // : 1
x^-1 = -7/8
-1 < 0
1/(x^1) = -7/8 // * x^1
1 = -7/8*x^1 // : -7/8
-8/7 = x^1
x = -8/7
t_1 = 0
x^-1+0 = 0
x^-1 = 0
1*x^-1 = 0 // : 1
x^-1 = 0
x naleu017Cy do O
x = -8/7
| x*2=47 | | (-2/3)x=4 | | c+10=2c+5 | | 3x/10-4=x/5+1 | | X+1.2=1.6 | | 1/3(2y-9)=7 | | 10d+9=49 | | 3a-2=4 | | (4v-1)(5+v)=0 | | n+(1/3)=(1/5) | | 2z+1=51 | | y^2=60 | | 3n-s=7n+11 | | w+42=7w | | 8s-18=-26+9s | | 8m-11=-15+9m | | 8-2y=3-y-2 | | 2+4=+7 | | f(x)=2x+cosx+1 | | 6((3x)/(8x+5))^5*(15/(8x+5)^2) | | 14s+8t=34 | | 3-2(c-4)=5x+3 | | 2x^2+16x-12=0 | | 4x+7x+7=0 | | 20x^2+5=21x | | logx=-0.3 | | 2x+24=30x | | 65=35-5(x-1) | | 2+6x+9=0 | | 2x/5=3x+7 | | h/4+3=-6 | | x-2(6)=6 |