x(x+2)+2(x-4)=0

Simple and best practice solution for x(x+2)+2(x-4)=0 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+2)+2(x-4)=0 equation:


Simplifying
x(x + 2) + 2(x + -4) = 0

Reorder the terms:
x(2 + x) + 2(x + -4) = 0
(2 * x + x * x) + 2(x + -4) = 0
(2x + x2) + 2(x + -4) = 0

Reorder the terms:
2x + x2 + 2(-4 + x) = 0
2x + x2 + (-4 * 2 + x * 2) = 0
2x + x2 + (-8 + 2x) = 0

Reorder the terms:
-8 + 2x + 2x + x2 = 0

Combine like terms: 2x + 2x = 4x
-8 + 4x + x2 = 0

Solving
-8 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 4x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 4x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 4x + x2 = 0 + 8
4x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
4x + x2 = 8

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 8 + 4

Reorder the terms:
4 + 4x + x2 = 8 + 4

Combine like terms: 8 + 4 = 12
4 + 4x + x2 = 12

Factor a perfect square on the left side:
(x + 2)(x + 2) = 12

Calculate the square root of the right side: 3.464101615

Break this problem into two subproblems by setting 
(x + 2) equal to 3.464101615 and -3.464101615.

Subproblem 1

x + 2 = 3.464101615 Simplifying x + 2 = 3.464101615 Reorder the terms: 2 + x = 3.464101615 Solving 2 + x = 3.464101615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 3.464101615 + -2 Combine like terms: 2 + -2 = 0 0 + x = 3.464101615 + -2 x = 3.464101615 + -2 Combine like terms: 3.464101615 + -2 = 1.464101615 x = 1.464101615 Simplifying x = 1.464101615

Subproblem 2

x + 2 = -3.464101615 Simplifying x + 2 = -3.464101615 Reorder the terms: 2 + x = -3.464101615 Solving 2 + x = -3.464101615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -3.464101615 + -2 Combine like terms: 2 + -2 = 0 0 + x = -3.464101615 + -2 x = -3.464101615 + -2 Combine like terms: -3.464101615 + -2 = -5.464101615 x = -5.464101615 Simplifying x = -5.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.464101615, -5.464101615}

See similar equations:

| -2x-3y=-10 | | 4r+8r=12 | | 1/3(18x+12)=-3+40 | | 4z=12-44 | | 23+19=2(x-8) | | 418/22= | | 2(1/3)= | | 4*x^2+x-32*x+36*y+64=0 | | 23+19=(2x-8) | | 6=1-0.6x | | 27x=18x+54x+6 | | 4a+6a-5=15 | | 6x=1-0.6 | | 20-12x=-11x+40 | | -7(6+y)+20=-5(4+y)-2-2y | | 7X+14=7X-9 | | -12+q=3 | | 6-1=0.6x | | 10(x-3)=-2x+30 | | x+23+4x=-45-4x-49 | | -42=2.8x+.5(-9.8)x^2 | | 50c+16-21c=45 | | 6+1=0.6x | | 7m^2-13m-2= | | -(18+x)=22-12x-x | | 5i+(-3i+i)= | | -0.5+1.25=3.5z+0.75 | | 6=0.6x | | 3y-ax=8 | | 17=5m-3 | | 3(x-9)=4+4x | | 6+0.6=x |

Equations solver categories