20x+40-x^2-2x=121

Simple and best practice solution for 20x+40-x^2-2x=121 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 20x+40-x^2-2x=121 equation: 



20x+40-x^2-2x=121

We move all terms to the left:

20x+40-x^2-2x-(121)=0

We add all the numbers together, and all the variables

-1x^2+18x-81=0

a = -1; b = 18; c = -81;
Δ = b2-4ac
Δ = 182-4·(-1)·(-81)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-18}{-2}=+9$

See similar equations:

| 5x^2-11x-14=-8x | | -18x-5=-13 | | 11x^2-5x+3=x^2-4x | | 2-2t=4- | | 23=41-7(-2-3w) | | 11x2-5x+3=x2-4x | | x^2-11x-106=-4 | | 11=–6x–2 | | X+2=4)x+35 | | 96+(9x+66)=180 | | 17x^2-12x+5=9x^2 | | 96-(9x+66)=180 | | 3x+10=5+4x | | -10(x+2)+113=30+23 | | x+56-28=180 | | 9x+18-3x+6=0 | | 75+(14x+21)=180 | | 60=1.5^x | | y-21=14 | | 75-(14x+21)=180 | | 5y2+18=143 | | 1/2y=+2 | | x,5=-3 | | -2f=-8 | | 5y-32=-6(y+9) | | -2(2n+4)=16 | | 25z+12=87 | | -2(2n+4)=16 | | 49-p=44 | | a2-15a+56=0 | | 7w+18-w=90 | | 2-5(c+9)=73 |

Equations solver categories