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)
9*x+6/x = 0
9*x^1+6*x^-1 = 0
(9*x^2+6*x^0)/(x^1) = 0 // * x^2
x^1*(9*x^2+6*x^0) = 0
x^1
9*x^2+6 = 0
9*x^2+6 = 0
DELTA = 0^2-(4*6*9)
DELTA = -216
DELTA < 0
x in { }
x belongs to the empty set
| [9(M+4)-17]-[3(M-3)+1]= | | 7=(4+9y)/7 | | -4x-3y=14 | | 3(3c-1)-1=7c | | 2(4-9x-8x)+6(6x+2)=28 | | s/-2=-5 | | 2-3j= | | 1/5(4(k+2)-(3-k))=4 | | x+(23+x)+(-31+3*x)=928 | | (40x^2)(2+20x)= | | 5y+2(y-9)=4(y+1)-3 | | -4r-3(r+3)=4 | | 2x^2-18x+5=0 | | 11=5x-9 | | x^2-20x+4=0 | | 11x^2-16x+6=0 | | (c+3)-2c-(1-c)=2 | | -4t-2=15 | | 3x+200x-40000=0 | | 0.04(y-4)+0.12y=0.08y-0.7 | | 5x*10=15 | | 6^3+(3/2) | | n/7+2=-17 | | -7=-7+4y | | 9p=36.90 | | p/36.90=9 | | 2[3(x-y)-3(6x-6y)]= | | 3n+5n-7=61 | | -14=8p+4 | | p/9=36.90 | | 47+5y-21=17y-14-4y | | 0.6+1.1=0.9x-1.3 |