If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( c )
4*c-2 = 0
4*c-2 = 0
4*c-2 = 0
4*c-2 = 0 // + 2
4*c = 2 // : 4
c = 2/4
c = 1/2
c in (-oo:1/2) U (1/2:+oo)
(16*c^2-(8*c)-1)/(4*c-2) = 0
(16*c^2-8*c-1)/(4*c-2) = 0
16*c^2-8*c-1 = 0
16*c^2-8*c-1 = 0
DELTA = (-8)^2-(-1*4*16)
DELTA = 128
DELTA > 0
c = (128^(1/2)+8)/(2*16) or c = (8-128^(1/2))/(2*16)
c = (8*2^(1/2)+8)/32 or c = (8-8*2^(1/2))/32
(c-((8-8*2^(1/2))/32))*(c-((8*2^(1/2)+8)/32)) = 0
((c-((8-8*2^(1/2))/32))*(c-((8*2^(1/2)+8)/32)))/(4*c-2) = 0
( c-((8*2^(1/2)+8)/32) )
c-((8*2^(1/2)+8)/32) = 0 // + (8*2^(1/2)+8)/32
c = (8*2^(1/2)+8)/32
( c-((8-8*2^(1/2))/32) )
c-((8-8*2^(1/2))/32) = 0 // + (8-8*2^(1/2))/32
c = (8-8*2^(1/2))/32
c in { (8*2^(1/2)+8)/32, (8-8*2^(1/2))/32 }
| 3(a+2)=-18 | | -0.25x-2=-2x+5 | | 7cos(4x-1)-3=0 | | 1.5x+5=-0.5x-3 | | =2ab+3ba | | a-1=2a-7 | | xy+2x=13-4y | | 0*6-12/3-1 | | 3x-(10x-((9-30x+25x^2)-8)+(5x-3)(5x+4))=3(6x^2-4)-9(3x+(2x-1)(x-3)) | | 1-2a=49 | | 5x-0.5=0.5-5x | | 4.7+2.7= | | 4u+2.7= | | 2q^2-8q+50=0 | | x+9=x+2 | | x=100-2p | | 4/9×5/20 | | 5(2-C)=2(2x-13) | | 2x+125=0 | | 5x+7y=-41 | | 70=5x+13+3x+33 | | (x-15)(x+8)= | | 10-7t-19=7t+31-4t | | 4x-5=5+x | | 3+n=39-2n | | 5/12X5 | | 18(y-1)+12y=-8 | | 3(m-2)=6(m+4)-6 | | 5(2y+1)+7(4y+2)=0 | | 5sinx+12cosx-13=y | | m^3+8m-1=0 | | -50x^2+13=42x-39 |