If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( h )
h = 0
h = 0
h = 0
h in (-oo:0) U (0:+oo)
(7*h^2-9*h)/h = 0
7*h^2-9*h = 0
h*(7*h-9) = 0
7*h-9 = 0 // + 9
7*h = 9 // : 7
h = 9/7
h*(h-9/7) = 0
h-9/7 = 0
h-9/7 = 0 // + 9/7
h = 9/7
h = 9/7
| 7x+8x-7=3(5x+5) | | 5x-20=30(x-4) | | -(7y+4)-(-6y-7)=4 | | 5x+4=2x+40 | | 47=-p+3(4p+1) | | -2=2x^2-3x+k | | 4x+4=-16+-1x | | w=1/7(x+y-z) | | 16(2x-6)=4(8x+2) | | -3(x-5)=-8x | | 1/5x-7/5=-7/3x+3 | | 0=6x^2+48x+120 | | 3+13p-2=9p+50-3p | | 6x+4=14+x | | x^2-49=16 | | 7x-5-2x=35 | | -1/3u+6=-3/5u-7/3 | | 10=7x+20 | | -64=4(3m+4)-8(-6m-5) | | -6x+2=-58+4x | | 3+10=-55-10x | | 6m+16m=110 | | 6=x-5x+10 | | 5x+7x+3=87 | | x/10=-28 | | 52=4(1+4k) | | 19-g=20 | | 3x+7=16+5x | | 3.2-1.8=3 | | 03x-25=x+55 | | -6x+2+x=17 | | 1/5y-6/5=-1/2y-4 |