x(21-x)=126

Simple and best practice solution for x(21-x)=126 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 x(21-x)=126 equation: 



x(21-x)=126

We move all terms to the left:

x(21-x)-(126)=0

We add all the numbers together, and all the variables

x(-1x+21)-126=0

We multiply parentheses

-1x^2+21x-126=0

a = -1; b = 21; c = -126;
Δ = b2-4ac
Δ = 212-4·(-1)·(-126)
Δ = -63
Delta is less than zero, so there is no solution for the equation

See similar equations:

| 6-10k=-10k+6 | | 32-4x=10+7x | | -3-(13+4x)=-3(5-9x)+2 | | -5d+10=7d+10 | | 4x-8+95=3x-16 | | 1=k/2−2 | | 3-3r=-3r+3 | | 1-(3x+4)=3(2x+5) | | x^2(x+6)-4(x+6)=0 | | 1=k2− 2 | | -10w+2=-10w+3 | | 1+x/1+x^2=3/5 | | 15x^2-17x+11=0 | | `18-3-1=-4x-3x+146 | | -16p-13=15-16p-7p | | 88+18x=180 | | 24x-5=173 | | 18x-3-1=-4x3x+146 | | 5t-9=3t=7 | | 11-19b=-b+11-18b | | 20=v4/5 | | 5x-5=16x=14 | | 8m-14=2(4m-7) | | 7/4(4x+15)=15 | | p•5.5=11 | | 180=10x+8x+5+83 | | 11q+18=11q-11 | | Y=2x+2/5 | | 3x+x+1=6x-2x+1 | | 20=4/5v | | -1/12j=-3 | | -6n-7=1-6n |

Equations solver categories