3x*3x+7x+2=180

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Solution for 3x*3x+7x+2=180 equation:


Simplifying
3x * 3x + 7x + 2 = 180

Reorder the terms for easier multiplication:
3 * 3x * x + 7x + 2 = 180

Multiply 3 * 3
9x * x + 7x + 2 = 180

Multiply x * x
9x2 + 7x + 2 = 180

Reorder the terms:
2 + 7x + 9x2 = 180

Solving
2 + 7x + 9x2 = 180

Solving for variable 'x'.

Reorder the terms:
2 + -180 + 7x + 9x2 = 180 + -180

Combine like terms: 2 + -180 = -178
-178 + 7x + 9x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-178 + 7x + 9x2 = 0

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

Divide each side by '9'.
-19.77777778 + 0.7777777778x + x2 = 0

Move the constant term to the right:

Add '19.77777778' to each side of the equation.
-19.77777778 + 0.7777777778x + 19.77777778 + x2 = 0 + 19.77777778

Reorder the terms:
-19.77777778 + 19.77777778 + 0.7777777778x + x2 = 0 + 19.77777778

Combine like terms: -19.77777778 + 19.77777778 = 0.00000000
0.00000000 + 0.7777777778x + x2 = 0 + 19.77777778
0.7777777778x + x2 = 0 + 19.77777778

Combine like terms: 0 + 19.77777778 = 19.77777778
0.7777777778x + x2 = 19.77777778

The x term is 0.7777777778x.  Take half its coefficient (0.3888888889).
Square it (0.1512345679) and add it to both sides.

Add '0.1512345679' to each side of the equation.
0.7777777778x + 0.1512345679 + x2 = 19.77777778 + 0.1512345679

Reorder the terms:
0.1512345679 + 0.7777777778x + x2 = 19.77777778 + 0.1512345679

Combine like terms: 19.77777778 + 0.1512345679 = 19.9290123479
0.1512345679 + 0.7777777778x + x2 = 19.9290123479

Factor a perfect square on the left side:
(x + 0.3888888889)(x + 0.3888888889) = 19.9290123479

Calculate the square root of the right side: 4.464192239

Break this problem into two subproblems by setting 
(x + 0.3888888889) equal to 4.464192239 and -4.464192239.

Subproblem 1

x + 0.3888888889 = 4.464192239 Simplifying x + 0.3888888889 = 4.464192239 Reorder the terms: 0.3888888889 + x = 4.464192239 Solving 0.3888888889 + x = 4.464192239 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3888888889' to each side of the equation. 0.3888888889 + -0.3888888889 + x = 4.464192239 + -0.3888888889 Combine like terms: 0.3888888889 + -0.3888888889 = 0.0000000000 0.0000000000 + x = 4.464192239 + -0.3888888889 x = 4.464192239 + -0.3888888889 Combine like terms: 4.464192239 + -0.3888888889 = 4.0753033501 x = 4.0753033501 Simplifying x = 4.0753033501

Subproblem 2

x + 0.3888888889 = -4.464192239 Simplifying x + 0.3888888889 = -4.464192239 Reorder the terms: 0.3888888889 + x = -4.464192239 Solving 0.3888888889 + x = -4.464192239 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3888888889' to each side of the equation. 0.3888888889 + -0.3888888889 + x = -4.464192239 + -0.3888888889 Combine like terms: 0.3888888889 + -0.3888888889 = 0.0000000000 0.0000000000 + x = -4.464192239 + -0.3888888889 x = -4.464192239 + -0.3888888889 Combine like terms: -4.464192239 + -0.3888888889 = -4.8530811279 x = -4.8530811279 Simplifying x = -4.8530811279

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.0753033501, -4.8530811279}

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