X(x+3)=720

Simple and best practice solution for X(x+3)=720 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(x+3)=720 equation:



X(X+3)=720
We move all terms to the left:
X(X+3)-(720)=0
We multiply parentheses
X^2+3X-720=0
a = 1; b = 3; c = -720;
Δ = b2-4ac
Δ = 32-4·1·(-720)
Δ = 2889
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:
$\sqrt{\Delta}=\sqrt{2889}=\sqrt{9*321}=\sqrt{9}*\sqrt{321}=3\sqrt{321}$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-3\sqrt{321}}{2*1}=\frac{-3-3\sqrt{321}}{2} $
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+3\sqrt{321}}{2*1}=\frac{-3+3\sqrt{321}}{2} $

See similar equations:

| 8.37w-11=-47w | | 7+8(2-8b)=215 | | 4/9=x-2/3 | | 6+2x^2=6x | | 6.1.8+7n=9.5-4n | | 3x​ +12=20 | | 15x^2+28x+3=-2 | | (15-33x)+(13+15x)=180 | | 5x+5x+2x+2x=98 | | w-5+10=27 | | 1/6j=3 | | x+4+x=10 | | m/8+48=54 | | 5r+3=-52 | | 4x+6|2=3x-15|3 | | 3x-48=7x | | 4c+9=89 | | 4g+8=72 | | X-5/16Xx2X/20X=X | | x+8=4x-7+5x+9 | | |x+8|=|x-2| | | -(3x+3)-2x=-4(x-2) | | 3x-2+3x-2+2x+2x=36 | | 4x+3x+10=59 | | -15n+2=-13n-2 | | X-5/16x(2x/20x)=x | | 9(2x-1)^2+4=-15(2x-1) | | 6k-12=124 | | 09=20r | | 32=-x-8 | | 50=6x÷2 | | j+32=78 |

Equations solver categories