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)
15-((24/4)*x^2) = 0
15-6*x^2 = 0
-6*x^2 = -15 // : -6
x^2 = 5/2
x^2 = 5/2 // ^ 1/2
abs(x) = (5/2)^(1/2)
x = (5/2)^(1/2) or x = -(5/2)^(1/2)
x in { (5/2)^(1/2), -(5/2)^(1/2) }
| 4j=72 | | 18+2=72214 | | 2x-9+x-4=x | | (y+7)=4(x-6) | | 60+40=x+20 | | 7(-10+5)=-525 | | 4x-4+2=2x+2x-2 | | 7+2=149 | | 7.5-2.6= | | 5n+3-6n= | | 6x=10+4 | | ((4/3)x)(r^3) | | 151-2x=6x+3+84 | | (4/3)x(r^3) | | -115=5(4x+5) | | 10x+y-3x+17y= | | 3-6(8-6b)= | | -4f-6+9f+7= | | 12y^2-6y^2= | | C=20+6h | | 5h+3=6 | | 4/3x(r^3) | | 2x^2+y=13 | | 112=3(x+3) | | .50(800-L)+.75L=550 | | 3(3x-5)=-42 | | (7)/(9)-(19)/(27) | | 5(w+6)-7w=34 | | (2*x-5)/x-3=0 | | 75+70=10x+45 | | 10x^2-30x+5=0 | | (x)(x+1)=1056 |