If it's not what You are looking for type in the equation solver your own equation and let us solve it.
i in (-oo:+oo)
4-(((2*i)/3)*i) = 0
(-2/3)*i^2+4 = 0
-2/3*i^2 = -4 // : -2/3
i^2 = 6
i^2 = 6 // ^ 1/2
abs(i) = 6^(1/2)
i = 6^(1/2) or i = -6^(1/2)
i in { 6^(1/2), -6^(1/2) }
| 7x+9=2x-59 | | -6x+2=-4(2x+4) | | 4r-10+2r=3-4r | | 7xsquared-2x-2= | | 6a+12b-12a+10b= | | 2/x+3=7/6x-2 | | 2=5(x+1) | | X+5=72 | | x+91282.05128=71200 | | -x-1/7=x+1/6+4/7 | | 2+3x=-2+4x | | y=-(x+2) | | 6x+3=2(3x+4) | | 7N=36-5N | | 71200=.78*x | | 14-n=2n-5n | | (-20)-28/(-4) | | -14b-28=-10b+30 | | 3(x-2)=4x+2 | | 39/-5 | | 1x^2+0.000174=0.0000174 | | 6y-8+y=2(5-y) | | 5(1)+8-12(1)=16-15(1) | | 1x^2+0.000174=0.0000274 | | .8(x-6)=13.6 | | 12+2x=-6+3x | | 2(m-1.5)=1.5(m-3) | | -3x-1/2=23/2 | | 4+9+x=20 | | x*.78=71200 | | 2a+2/3=-4/5 | | 16-148+4= |