.5x^2+2(3x)+2(x+2)=336

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Solution for .5x^2+2(3x)+2(x+2)=336 equation:


Simplifying
0.5x2 + 2(3x) + 2(x + 2) = 336

Remove parenthesis around (3x)
0.5x2 + 2 * 3x + 2(x + 2) = 336

Multiply 2 * 3
0.5x2 + 6x + 2(x + 2) = 336

Reorder the terms:
0.5x2 + 6x + 2(2 + x) = 336
0.5x2 + 6x + (2 * 2 + x * 2) = 336
0.5x2 + 6x + (4 + 2x) = 336

Reorder the terms:
4 + 6x + 2x + 0.5x2 = 336

Combine like terms: 6x + 2x = 8x
4 + 8x + 0.5x2 = 336

Solving
4 + 8x + 0.5x2 = 336

Solving for variable 'x'.

Reorder the terms:
4 + -336 + 8x + 0.5x2 = 336 + -336

Combine like terms: 4 + -336 = -332
-332 + 8x + 0.5x2 = 336 + -336

Combine like terms: 336 + -336 = 0
-332 + 8x + 0.5x2 = 0

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

Divide each side by '0.5'.
-664 + 16x + x2 = 0

Move the constant term to the right:

Add '664' to each side of the equation.
-664 + 16x + 664 + x2 = 0 + 664

Reorder the terms:
-664 + 664 + 16x + x2 = 0 + 664

Combine like terms: -664 + 664 = 0
0 + 16x + x2 = 0 + 664
16x + x2 = 0 + 664

Combine like terms: 0 + 664 = 664
16x + x2 = 664

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = 664 + 64

Reorder the terms:
64 + 16x + x2 = 664 + 64

Combine like terms: 664 + 64 = 728
64 + 16x + x2 = 728

Factor a perfect square on the left side:
(x + 8)(x + 8) = 728

Calculate the square root of the right side: 26.981475126

Break this problem into two subproblems by setting 
(x + 8) equal to 26.981475126 and -26.981475126.

Subproblem 1

x + 8 = 26.981475126 Simplifying x + 8 = 26.981475126 Reorder the terms: 8 + x = 26.981475126 Solving 8 + x = 26.981475126 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 26.981475126 + -8 Combine like terms: 8 + -8 = 0 0 + x = 26.981475126 + -8 x = 26.981475126 + -8 Combine like terms: 26.981475126 + -8 = 18.981475126 x = 18.981475126 Simplifying x = 18.981475126

Subproblem 2

x + 8 = -26.981475126 Simplifying x + 8 = -26.981475126 Reorder the terms: 8 + x = -26.981475126 Solving 8 + x = -26.981475126 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -26.981475126 + -8 Combine like terms: 8 + -8 = 0 0 + x = -26.981475126 + -8 x = -26.981475126 + -8 Combine like terms: -26.981475126 + -8 = -34.981475126 x = -34.981475126 Simplifying x = -34.981475126

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.981475126, -34.981475126}

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