If it's not what You are looking for type in the equation solver your own equation and let us solve it.
10x^2+90x+300=0
a = 10; b = 90; c = +300;
Δ = b2-4ac
Δ = 902-4·10·300
Δ = -3900
Delta is less than zero, so there is no solution for the equation
| 9x^2-3x-56=0 | | -39=10b+3b | | 10x+5x+10=15+1+1+x | | 2x^2+8x24=0 | | -38=-7(a+10)-10 | | 3x+2=(2x+13)/3 | | 4z+2z=-66 | | -14=4d+10 | | 3/4x+21=42 | | 8x+(x-5)=5 | | 7w-8w=-6 | | 16x^2-5x-21=0 | | x2-126x+125=0 | | 0.4=0.8m | | 8=8v=4(v+8 | | 1+a/5=-4 | | (2x+4)(x-1)=180 | | 24x^2+116x+120=0 | | 28=2w-12 | | 5(x+3)=-12 | | 26=v/4+12 | | 11(x-8)=-2(11-4x) | | 15x^2+170x+400=0 | | 5/7=y-2 | | 3(4x+6)-3=4(2x-3)-5x | | 2(3x+3)=3(2x+2 | | 30*6+6/2=x | | F(x)=-5x+14 | | 4/3-5/3=x-2 | | n–2=10n+42 | | 21x^2-144x-192=0 | | 400-10x=5+0.5x |