2x(3+x)=23

Simple and best practice solution for 2x(3+x)=23 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 2x(3+x)=23 equation:


Simplifying
2x(3 + x) = 23
(3 * 2x + x * 2x) = 23
(6x + 2x2) = 23

Solving
6x + 2x2 = 23

Solving for variable 'x'.

Reorder the terms:
-23 + 6x + 2x2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + 6x + 2x2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-11.5 + 3x + x2 = 0

Move the constant term to the right:

Add '11.5' to each side of the equation.
-11.5 + 3x + 11.5 + x2 = 0 + 11.5

Reorder the terms:
-11.5 + 11.5 + 3x + x2 = 0 + 11.5

Combine like terms: -11.5 + 11.5 = 0.0
0.0 + 3x + x2 = 0 + 11.5
3x + x2 = 0 + 11.5

Combine like terms: 0 + 11.5 = 11.5
3x + x2 = 11.5

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 11.5 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 11.5 + 2.25

Combine like terms: 11.5 + 2.25 = 13.75
2.25 + 3x + x2 = 13.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 13.75

Calculate the square root of the right side: 3.708099244

Break this problem into two subproblems by setting 
(x + 1.5) equal to 3.708099244 and -3.708099244.

Subproblem 1

x + 1.5 = 3.708099244 Simplifying x + 1.5 = 3.708099244 Reorder the terms: 1.5 + x = 3.708099244 Solving 1.5 + x = 3.708099244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 3.708099244 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 3.708099244 + -1.5 x = 3.708099244 + -1.5 Combine like terms: 3.708099244 + -1.5 = 2.208099244 x = 2.208099244 Simplifying x = 2.208099244

Subproblem 2

x + 1.5 = -3.708099244 Simplifying x + 1.5 = -3.708099244 Reorder the terms: 1.5 + x = -3.708099244 Solving 1.5 + x = -3.708099244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -3.708099244 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -3.708099244 + -1.5 x = -3.708099244 + -1.5 Combine like terms: -3.708099244 + -1.5 = -5.208099244 x = -5.208099244 Simplifying x = -5.208099244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.208099244, -5.208099244}

See similar equations:

| -5/6s=-20 | | 100=ae^3b | | 181.2408=4*3.14*r^2 | | 5r+7=4r | | n^2+20n+19=0 | | 8k+8=9k | | R(x)=-5x-1 | | 7200/3=h | | 5/4m=15 | | 72+n=51 | | -3.5x=45.85 | | 6v-4=2v+12 | | 4n^2-32n+63=0 | | 8c-18+3c+38= | | 5ln(x)=-0.7 | | -X=2/5 | | 9x^2-45x=0 | | 2x+2x+14=354 | | 128+47=h | | 2x+2x-14=354 | | 10d+6=3D+20 | | 2x^2-9x+10=3 | | 3x/7=9/14 | | (y)(dy/dx)=tan(5x) | | 10e=x | | 10n^2+93n-70=0 | | 25x+140=15 | | 12d^3+4d^2=0 | | 2x+10+4x+7+7x-3+2x+1=180 | | -2x^2-2x+60=0 | | 34-15=r | | 3x+30=12x-70 |

Equations solver categories