If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2+15x+5x+105=0
We add all the numbers together, and all the variables
x^2+20x+105=0
a = 1; b = 20; c = +105;
Δ = b2-4ac
Δ = 202-4·1·105
Δ = -20
Delta is less than zero, so there is no solution for the equation
| 1/3x^2+2=5 | | b−1.6÷4=−3b= | | 8x–4=5x+11 | | 11v=2v=72 | | y-20=-14 | | X+4(x+2)=212 | | 4a+71+53=180 | | 3(3v-2)=3/3(4-24v) | | 6h+48+66=180 | | -4x-3=6x+25 | | n/6-7=4 | | 15+2x=17+7x | | (9v+7)(v+7)=0 | | 3e+1+46+67=180 | | 1/5x5/1=6/35/1 | | 10n+25=0 | | 10x+10+4x+12=180 | | -2x-5=-3x+12 | | 169x^2+4=0 | | Q1(x)=x4–8x3+18x2–16x+5 | | 500=2.5x | | 25x=48 | | 2^3v+1=2^5 | | 3x+14=19-3x | | 35y=56 | | 5a-a+4=4 | | 3k=6k | | 5x+65=0x | | x+x-20°=90° | | -10+g=-g+10 | | u-10=11 | | 16v−6v=20 |