If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
4*x-((2/4)*x^2)-1 = 0
(-1/2)*x^2+4*x-1 = 0
4*x-1/2*x^2-1 = 0
DELTA = 4^2-(-1*(-1/2)*4)
DELTA = 14
DELTA > 0
x = (14^(1/2)-4)/(-1/2*2) or x = (-14^(1/2)-4)/(-1/2*2)
x = 4-14^(1/2) or x = 14^(1/2)+4
x in { 4-14^(1/2), 14^(1/2)+4 }
| -t=18 | | Dy=(xy^2+3xy)dx | | X+x+x+x=108 | | 3a+4=31finda | | -5A+8C=1 | | x+5.6=9.4 | | 2a+(-3C)=0 | | 30x-60=210 | | 6c+14=7c-7 | | 5x+tan(x)=0 | | 5x+4-2x=-14 | | 30-y=8 | | Y^2+19Y+6=0 | | (2x-3)=25 | | 3x^4-x^3+3=0 | | x*9=22 | | x^4+5x+5=0 | | 9*t=9.8-t^2 | | -10.5=log(x) | | r*r*t*t*t= | | 2*2*p= | | a*(3*9+b*n)= | | A*1-1*t= | | P=x^4-2x^3-3x^2+4x+4 | | 3*7-d*b= | | 3*z-0*b= | | 38*(3+2*c)= | | A*d+5*8= | | 2*a+5*c= | | A*1= | | B*(5*e+7)= | | (A+b)*5= |