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)
t_1 = X^2
t_1-121/3*x^2-9*x = 0
t_1-121/3*x^2-9*x = 0
DELTA = (-9)^2-(-121/3*4*t_1)
DELTA = 484/3*t_1+81
484/3*t_1+81 = 0
484/3*t_1+81 = 0 // - 81
484/3*t_1 = -81 // : 484/3
t_1 = -81/484/3
t_1 = -243/484
DELTA = 0 <=> t_2 = -243/484
x = 9/(-121/3*2) i t_1 = -243/484
x = -27/242 i t_1 = -243/484
( x = ((484/3*t_1+81)^(1/2)+9)/(-121/3*2) or x = (9-(484/3*t_1+81)^(1/2))/(-121/3*2) ) i t_1 > -243/484
( x = -3/242*((484/3*t_1+81)^(1/2)+9) or x = -3/242*(9-(484/3*t_1+81)^(1/2)) ) i t_1 > -243/484
t_1+243/484 > 0
t_1+243/484 > 0 // - 243/484
t_1 > -243/484
x in { -27/242, -3/242*((484/3*X^2+81)^(1/2)+9), -3/242*(9-(484/3*X^2+81)^(1/2)) }
| 3x+2y+4x+y= | | x^2-4kx+3+k=0 | | 2x-7(4x-3)=-109 | | -3(2p+7)-14=-2(p+8)+5 | | 12x^2-23x=-10 | | (5x+40)=(2x) | | 15+9=4x+16 | | 55+0.5x=0 | | 7(X-1)=3x+11 | | sinx=3/2√3 | | V^2-2x=3 | | -6=5x-22/-3 | | 4x-(-0.5x+1)=-10 | | 1/x-1-2/7=3 | | -1.5(x+3.2)+5=3x-8.8 | | -5(2z-1)=3(z+3) | | An=(3)n-1 | | 40=3y+16 | | 4(q+1)= | | ln(x+2)=ln(12)-ln(x+3) | | (3/5)^4 | | 1/4x-28=115 | | 2-3/7=a | | -50.00+0.5x=153.50 | | 12a^2b^3+48a^2b^2= | | 4/7x=-8/63 | | -50.00+0.5x=300.00 | | 7+5logx=12 | | 6+7=27 | | 5/6x4/8 | | 5:6x4/8 | | (15c^2-3c)and(35c-7)= |