If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x^2+6*x+9 = 0
x^2+6*x+9 = 0
x^2+6*x+9 = 0
x^2+6*x+9 = 0
DELTA = 6^2-(1*4*9)
DELTA = 0
x = -6/(1*2)
x = -3 or x = -3
x in (-oo:-3) U (-3:+oo)
(3*x^2-(12*x)-63)/(x^2+6*x+9) = 0
(3*x^2-12*x-63)/(x^2+6*x+9) = 0
3*x^2-12*x-63 = 0
3*(x^2-4*x-21) = 0
x^2-4*x-21 = 0
DELTA = (-4)^2-(-21*1*4)
DELTA = 100
DELTA > 0
x = (100^(1/2)+4)/(1*2) or x = (4-100^(1/2))/(1*2)
x = 7 or x = -3
3*(x+3)*(x-7) = 0
x^2+6*x+9 = 0
x^2+6*x+9 = 0
DELTA = 6^2-(1*4*9)
DELTA = 0
x = -6/(1*2)
x = -3 or x = -3
(x+3)^2 = 0
(3*(x+3)*(x-7))/((x+3)^2) = 0
( x+3 )
x+3 = 0 // - 3
x = -3
( x-7 )
x-7 = 0 // + 7
x = 7
x in { -3}
x = 7
| 8x-39=4x+3 | | 2x+2y-z=9 | | (x+1)(x-11) | | x^2+y^2+2x-35=0 | | 3(4t-10)=-54 | | -6c+(2c+4)=72 | | 6/n=48.6 | | 6xn=48.6 | | -2x-19(x+3)=-5(4x+3) | | -63i/-9i | | 7.1+n=10.3 | | ((2x^-5)/(y^3))^-4 | | 2(h+6+13)=59 | | 25n-8.5=101.5 | | 5-t=7(5-2t) | | 6p+1=19 | | 6log(3x-7)=1 | | (x+2)*(x^2-4)=0 | | 1.68h=6.72 | | ax+5x-4=-10 | | 3/4d=3/5 | | 13x-2(8+5x)=12-11x | | 4(x-12)=27-9 | | 6x+20=8x+14 | | k-28/16 | | -4(4-3a)=7a+34 | | 9+7x= | | -6=5-(8-n) | | (6x+v)(3x-4v+2)=0 | | 0=2x^2+3x-18 | | 16=5-(a+6) | | 6x/7=25/21 |