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)
1/16-x^2 = 0
-1*x^2 = -1/16 // : -1
x^2 = 1/16
x^2 = 1/16 // ^ 1/2
abs(x) = 1/4
x = 1/4 or x = -1/4
x in { 1/4, -1/4 }
| 6r+2t[r-t(r-5t)-r^2]= | | X+6+8=13+x | | 27+r=26+1 | | 4+3[d-5(4-d)]= | | 0.05x-0.07=0.1x+0.13 | | c+6[c+6(c+6)]= | | 3u^2-24u+9=0 | | 19.50/3 | | -7t^3-4t^2-8-t^3-5t^2+2= | | 1+6x=-3x-4 | | 61+p=-16 | | -2t^2(-3t^2)(-4t^2)= | | 1.6z=8 | | x+1=9x-2 | | 15.39+0.06x=16.14-0.15 | | 3x+2y[x+y(x-3y)-y^2]= | | 300+.05x=600+.01x | | p=25-(640+250) | | 4d-2d=6 | | 5+2[b-5(2-b)]= | | 6=-6+x | | M+25=25 | | 2*13y=46 | | a-4[a-4(a-4)]= | | 6=(k/9) | | 2x^2+3x-5-x^2-x-1= | | J+10-4=37 | | -2t^2-3t^2-4t^2= | | 3x+y+3z=9 | | p=25-(180+250) | | p=25-(160+250) | | -3z+34=-5 |