7x+18+x^2=180

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Solution for 7x+18+x^2=180 equation:


Simplifying
7x + 18 + x2 = 180

Reorder the terms:
18 + 7x + x2 = 180

Solving
18 + 7x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
18 + -180 + 7x + x2 = 180 + -180

Combine like terms: 18 + -180 = -162
-162 + 7x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-162 + 7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '162' to each side of the equation.
-162 + 7x + 162 + x2 = 0 + 162

Reorder the terms:
-162 + 162 + 7x + x2 = 0 + 162

Combine like terms: -162 + 162 = 0
0 + 7x + x2 = 0 + 162
7x + x2 = 0 + 162

Combine like terms: 0 + 162 = 162
7x + x2 = 162

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 162 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 162 + 12.25

Combine like terms: 162 + 12.25 = 174.25
12.25 + 7x + x2 = 174.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 174.25

Calculate the square root of the right side: 13.200378782

Break this problem into two subproblems by setting 
(x + 3.5) equal to 13.200378782 and -13.200378782.

Subproblem 1

x + 3.5 = 13.200378782 Simplifying x + 3.5 = 13.200378782 Reorder the terms: 3.5 + x = 13.200378782 Solving 3.5 + x = 13.200378782 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 13.200378782 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 13.200378782 + -3.5 x = 13.200378782 + -3.5 Combine like terms: 13.200378782 + -3.5 = 9.700378782 x = 9.700378782 Simplifying x = 9.700378782

Subproblem 2

x + 3.5 = -13.200378782 Simplifying x + 3.5 = -13.200378782 Reorder the terms: 3.5 + x = -13.200378782 Solving 3.5 + x = -13.200378782 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -13.200378782 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -13.200378782 + -3.5 x = -13.200378782 + -3.5 Combine like terms: -13.200378782 + -3.5 = -16.700378782 x = -16.700378782 Simplifying x = -16.700378782

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.700378782, -16.700378782}

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