If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( a )
a^2 = 0
a = 0
a^2 = 0
a^2 = 0
1*a^2 = 0 // : 1
a^2 = 0
a = 0
a = 0
a = 0
a in (-oo:0) U (0:+oo)
5/(a^2) = 1-4/a // - 1-4/a
5/(a^2)-(-4/a)-1 = 0
4*a^-1+5/(a^2)-1 = 0
4*a^-1+5*a^-2-1 = 0
t_1 = a^-1
5*t_1^2+4*t_1^1-1 = 0
5*t_1^2+4*t_1-1 = 0
DELTA = 4^2-(-1*4*5)
DELTA = 36
DELTA > 0
t_1 = (36^(1/2)-4)/(2*5) or t_1 = (-36^(1/2)-4)/(2*5)
t_1 = 1/5 or t_1 = -1
t_1 = -1
a^-1+1 = 0
1*a^-1 = -1 // : 1
a^-1 = -1
-1 < 0
1/(a^1) = -1 // * a^1
1 = -1*a^1 // : -1
-1 = a^1
a = -1
t_1 = 1/5
a^-1-1/5 = 0
1*a^-1 = 1/5 // : 1
a^-1 = 1/5
-1 < 0
1/(a^1) = 1/5 // * a^1
1 = 1/5*a^1 // : 1/5
5 = a^1
a = 5
a in { -1, 5 }
| 7x-(3x+9)=-7 | | 1/4+6b=-11/4 | | 1/4+6b=-11/4 | | 10+x= | | 14p-8=22+30p | | 5/(a-2)=-4/a+1 | | a^2-35=-2a | | 0=r^2+18.5-32 | | y^2-13y-30= | | 8y-4-y+7=52 | | 75-6x=4x-1 | | y=4x-8x+2 | | 3(x-4)+2=5x | | 602-67m=53m | | x/2(x-3)-2x/x+4=x/4(x-3) | | (X)(x)+2=6 | | 3/(a-4)=a/(a-2) | | 15(3+x)=120 | | 34x+7*8=250 | | x+10x-12=0 | | 8+5lnx=6 | | 90n+36n=0 | | -4-4x=-2 | | 34x+7/8=250 | | z=a+6i/2-i | | 14y^2+29y-15= | | 5(3+m)-7= | | 5msquare-1=0 | | z+16z+54=0 | | -20=10(1+3x) | | 2x/27-x | | (1+i)2=(-1+i) |