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)
(-4/5)*x^2 = 0
-4/5*x^2 = 0 // : -4/5
x^2 = 0
x = 0
x = 0
| -(16x^2-89.6x-90)=0 | | x+.09=151.51 | | 3(x+12)-8=4 | | 0.75x=14.4 | | 0.37+11m=2.65m-1.18 | | 5+14a=9a-15 | | X+.09x=151.51 | | -0.2*x^2-3x+8=g(x) | | 3/5(30x-15) | | -2sin-2cos*sin=0 | | 6/8x=14.4 | | b-10=9 | | y+13=0.88888889(x-3) | | (x+5)(x+4)=25 | | 5a-5=4a | | 2720=x(2x+4)*17 | | 16=n*2 | | 15m2n4p/3mn2p | | 5x+12=72-9x | | 5/0.75=w | | 42y+9=7 | | 5m(10+12m)=17 | | 2y=4(1/2) | | (x/6)(100)=.70 | | 4/0.75=w | | 4/0.75= | | y=4(1/2) | | x-(9212345+12012345)-92134=12 | | x=9000(-0.07)1 | | 7(x-2)=112 | | 28x^2+24x+35=0 | | 16=8*n |