If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x^2-20x+64=0
a = 4; b = -20; c = +64;
Δ = b2-4ac
Δ = -202-4·4·64
Δ = -624
Delta is less than zero, so there is no solution for the equation
| -2b-4=6 | | r-530=745 | | 9x-12=-30 | | 3n-15=22 | | 76=t-25 | | x=25+15x | | B=x-20 | | 7+c910=c | | -2(6x+5)=6(8-2x) | | 808=4h | | 2x-1=20-5x | | 20+n=-9 | | -9p–17=10 | | 520=k+295 | | 78=y-13 | | a+-17=-33 | | 10/15=12/y | | 3x−7=–14 | | x-123=64 | | 156=n-60 | | 6x-4+9x=13 | | 10m+55+77+49+4= | | r+-6=-1 | | 10o=100N | | 23+2x(3x+13)=180 | | -12x-18+2x=3-10x+7 | | 7c-9c=10 | | -11j=-99 | | 5y+3=-7= | | 5/x-9=-10 | | s-491=268 | | -7(x^2-10)^2-6=-258 |