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)
(2/5)*x^2-(10/9) = 0
(2/5)*x^2-10/9 = 0
2/5*x^2 = 10/9 // : 2/5
x^2 = 25/9
x^2 = 25/9 // ^ 1/2
abs(x) = 5/3
x = 5/3 or x = -5/3
x in { 5/3, -5/3 }
| 1/4(+3)=4-2(-3) | | -9=-h | | y-3/4=-5/12 | | 0=-8+4x^2 | | -4p=-44 | | 4/9x+3=-5/9-4 | | 12x(2x+3)=0 | | 1/4(4)=4-2(-3) | | -7x+5+3x=85 | | 3*(2+x)-4+7x=6-2 | | 30c+60=34c+40 | | 5(t-14)-4t=-3 | | 5(t+14)-4t=-3 | | x^2+2x+6=2 | | 4x+9=3x-49 | | -10+6=t+3 | | n^6+12/2-6 | | N^3/2=125 | | (n6)+12/2 | | 5(k+1)-4k=-5+8 | | 6(a+3)-5a=2 | | -16t^2+vt-s=0forv | | X+2/3=x/5 | | -9-3t+4t=4-2 | | 35x^2+135x=0 | | 8x-7x-8=6 | | 0.4+0.25(100-x)=32 | | 2x-16=3x-54 | | (2ln(5)-3)/(12(5)^3) | | y+17=6 | | 5x+6=2(2x+2) | | 0=x^2-40x-320 |