If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x^2+7x+80=0
a = 1; b = 7; c = +80;
Δ = b2-4ac
Δ = 72-4·1·80
Δ = -271
Delta is less than zero, so there is no solution for the equation
| 1/5+2/5n=3/7 | | (3x-1)(8x-2)=0 | | 7-2x=9-5x | | x(.07)=250 | | (5x-60=x+20)=(6x+40 | | 16^x-2*4^x-8=0 | | 4x=23/4 | | 8x-4=6x-18 | | (4x-10)=(11-2x) | | 11x-9=2x-9 | | 7.8^x=3 | | 2x-5+2x+8+4-8=180 | | 2x+8+2x+8+4(x+5)=180 | | x^2-66x+5=0 | | 2.5=x/60 | | -5x+22=8+21x | | -4x+22=8+21x | | 42*x=x*42.42 | | 5=x(4-x) | | 25+10x=9x+3 | | 56x+16=8 | | 3.9(-7+x)=0.9(9x-21) | | 4n+7=62 | | 3.5(-4x-10)=-17.5(4x-14) | | 8+9k=72 | | -5-y/3=1 | | x.x=400 | | 4x+5=10x+16 | | 60000=x+0.18x | | (y-12)*36=1260 | | (5x+2x)/2=252 | | 5(2x+27)=405 |