108=.5(x+6)x

Simple and best practice solution for 108=.5(x+6)x 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 108=.5(x+6)x equation:


Simplifying
108 = 0.5(x + 6) * x

Reorder the terms:
108 = 0.5(6 + x) * x

Reorder the terms for easier multiplication:
108 = 0.5x(6 + x)
108 = (6 * 0.5x + x * 0.5x)
108 = (3x + 0.5x2)

Solving
108 = 3x + 0.5x2

Solving for variable 'x'.

Reorder the terms:
108 + -3x + -0.5x2 = 3x + -3x + 0.5x2 + -0.5x2

Combine like terms: 3x + -3x = 0
108 + -3x + -0.5x2 = 0 + 0.5x2 + -0.5x2
108 + -3x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
108 + -3x + -0.5x2 = 0.0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
-216 + 6x + x2 = 0

Move the constant term to the right:

Add '216' to each side of the equation.
-216 + 6x + 216 + x2 = 0 + 216

Reorder the terms:
-216 + 216 + 6x + x2 = 0 + 216

Combine like terms: -216 + 216 = 0
0 + 6x + x2 = 0 + 216
6x + x2 = 0 + 216

Combine like terms: 0 + 216 = 216
6x + x2 = 216

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 216 + 9

Reorder the terms:
9 + 6x + x2 = 216 + 9

Combine like terms: 216 + 9 = 225
9 + 6x + x2 = 225

Factor a perfect square on the left side:
(x + 3)(x + 3) = 225

Calculate the square root of the right side: 15

Break this problem into two subproblems by setting 
(x + 3) equal to 15 and -15.

Subproblem 1

x + 3 = 15 Simplifying x + 3 = 15 Reorder the terms: 3 + x = 15 Solving 3 + x = 15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 15 + -3 Combine like terms: 3 + -3 = 0 0 + x = 15 + -3 x = 15 + -3 Combine like terms: 15 + -3 = 12 x = 12 Simplifying x = 12

Subproblem 2

x + 3 = -15 Simplifying x + 3 = -15 Reorder the terms: 3 + x = -15 Solving 3 + x = -15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -15 + -3 Combine like terms: 3 + -3 = 0 0 + x = -15 + -3 x = -15 + -3 Combine like terms: -15 + -3 = -18 x = -18 Simplifying x = -18

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12, -18}

See similar equations:

| 2.8=log(x) | | 4(6x+7)=52 | | 2x-13x+21=0 | | 6ln(8x)=24 | | f(x+4)=9x+3 | | 2cos(x^(1/2)) | | 55=x+6*x | | X+12=7+3 | | 2/3x-1/x= | | g+(3g-1)=39 | | 2cos(x^1/2) | | a+16a+9a+4a= | | 14u^7-10u^5/2u^3 | | (4+v)(4v+6)=0 | | 12x^7-16x^3/2x^3 | | 3x+80=x+120 | | -9x^2+4y^2-54x-117=0 | | 14+4x=-38 | | 1-5h=-3 | | x^3+5x^2+-1x+-5=0 | | 13+4b=-2 | | 100=2w+230 | | 2(n+4n)=300 | | 8(3x-4)-2=4 | | 3-s=-5 | | 3t+8=-3 | | y=5y-4 | | 2.5-x=-x+2.5 | | x+3x=1.60 | | (2x-5)*(2x+5)=5 | | 2x+3x-10+x+10=180 | | 2+.25x=-7 |

Equations solver categories