3x^2+8+5x=180

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Solution for 3x^2+8+5x=180 equation:


Simplifying
3x2 + 8 + 5x = 180

Reorder the terms:
8 + 5x + 3x2 = 180

Solving
8 + 5x + 3x2 = 180

Solving for variable 'x'.

Reorder the terms:
8 + -180 + 5x + 3x2 = 180 + -180

Combine like terms: 8 + -180 = -172
-172 + 5x + 3x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-172 + 5x + 3x2 = 0

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

Divide each side by '3'.
-57.33333333 + 1.666666667x + x2 = 0

Move the constant term to the right:

Add '57.33333333' to each side of the equation.
-57.33333333 + 1.666666667x + 57.33333333 + x2 = 0 + 57.33333333

Reorder the terms:
-57.33333333 + 57.33333333 + 1.666666667x + x2 = 0 + 57.33333333

Combine like terms: -57.33333333 + 57.33333333 = 0.00000000
0.00000000 + 1.666666667x + x2 = 0 + 57.33333333
1.666666667x + x2 = 0 + 57.33333333

Combine like terms: 0 + 57.33333333 = 57.33333333
1.666666667x + x2 = 57.33333333

The x term is 1.666666667x.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667x + 0.6944444447 + x2 = 57.33333333 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667x + x2 = 57.33333333 + 0.6944444447

Combine like terms: 57.33333333 + 0.6944444447 = 58.0277777747
0.6944444447 + 1.666666667x + x2 = 58.0277777747

Factor a perfect square on the left side:
(x + 0.8333333335)(x + 0.8333333335) = 58.0277777747

Calculate the square root of the right side: 7.617596588

Break this problem into two subproblems by setting 
(x + 0.8333333335) equal to 7.617596588 and -7.617596588.

Subproblem 1

x + 0.8333333335 = 7.617596588 Simplifying x + 0.8333333335 = 7.617596588 Reorder the terms: 0.8333333335 + x = 7.617596588 Solving 0.8333333335 + x = 7.617596588 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = 7.617596588 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = 7.617596588 + -0.8333333335 x = 7.617596588 + -0.8333333335 Combine like terms: 7.617596588 + -0.8333333335 = 6.7842632545 x = 6.7842632545 Simplifying x = 6.7842632545

Subproblem 2

x + 0.8333333335 = -7.617596588 Simplifying x + 0.8333333335 = -7.617596588 Reorder the terms: 0.8333333335 + x = -7.617596588 Solving 0.8333333335 + x = -7.617596588 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = -7.617596588 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = -7.617596588 + -0.8333333335 x = -7.617596588 + -0.8333333335 Combine like terms: -7.617596588 + -0.8333333335 = -8.4509299215 x = -8.4509299215 Simplifying x = -8.4509299215

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.7842632545, -8.4509299215}

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