If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n^2-3n+18=0
a = 1; b = -3; c = +18;
Δ = b2-4ac
Δ = -32-4·1·18
Δ = -63
Delta is less than zero, so there is no solution for the equation
| 14k-8k-4k=6 | | 22=-4x-7x | | 7x-3x+12=3x+7 | | 22.5*x−4.6=3.5 | | 15x+8x-2=90 | | 1/2(4r+14)=2r-7 | | 3x+.5(10-6)=21 | | -6+7x+9=3x-25 | | 15+3k=4(k+3) | | 8x+3-10x=-2x+7 | | 17x-11=91 | | 180=40+x+146 | | 8c+c-c-5c+3c=6 | | m7+9=14 | | 13x-12=53 | | s/16+10=12 | | 8x+3-4x=-2x+7 | | M+4=8+2m | | 288-24=8x | | 20+5x+12=60 | | (4x+3)(-6x+1)=3 | | 8x-74=78 | | w+36=80 | | 12g+4g+3g-13g=18 | | 18h-13h=15 | | 15x-9x-3x+2x=15 | | -a/24=9 | | 2^2x+6=1024 | | x+3x+4x-15=180 | | 3/4(7x-4)=-3 | | 9x*11x=80 | | 5x+85=90 |