If it's not what You are looking for type in the equation solver your own equation and let us solve it.
X2+18X+90=0
We add all the numbers together, and all the variables
X^2+18X+90=0
a = 1; b = 18; c = +90;
Δ = b2-4ac
Δ = 182-4·1·90
Δ = -36
Delta is less than zero, so there is no solution for the equation
| -15+1/4x=5 | | 6v+7=-77 | | 6(4z-7=30 | | 8(a+30=80 | | 15x=9x+30;x= | | 7x-30=460 | | (3x+8)=10x-3(-2x-12) | | 9x=8x+10;x= | | 01u-2u-7u-u+u=17 | | 27=17+x/9 | | 25x²+144=0 | | -32=3x-14 | | 5(4+x)-6x=252 | | 1/4-20x=-45 | | 6m-3-m=27 | | x=5x+10+7x-25+7x-5+10x+6x-15 | | 30-1/4x=-45 | | 2.255x-0.125=3x+3.175 | | 9/8=1+1/8g | | 8m+6=12m+1 | | b-4×3b-1=14 | | t+76=321 | | 9b-8b+6b=14 | | 10-4x=-24 | | w-86=751 | | (2x-2)x2=2x+12 | | (3x+25)/2=4x+5 | | 6x-12=12-6× | | 3h-79=4h | | Y=3700(1.99)x | | r-37=432 | | x=-3+3/13 |