x^2+10x-18=180

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Solution for x^2+10x-18=180 equation:


Simplifying
x2 + 10x + -18 = 180

Reorder the terms:
-18 + 10x + x2 = 180

Solving
-18 + 10x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
-18 + -180 + 10x + x2 = 180 + -180

Combine like terms: -18 + -180 = -198
-198 + 10x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-198 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '198' to each side of the equation.
-198 + 10x + 198 + x2 = 0 + 198

Reorder the terms:
-198 + 198 + 10x + x2 = 0 + 198

Combine like terms: -198 + 198 = 0
0 + 10x + x2 = 0 + 198
10x + x2 = 0 + 198

Combine like terms: 0 + 198 = 198
10x + x2 = 198

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 198 + 25

Reorder the terms:
25 + 10x + x2 = 198 + 25

Combine like terms: 198 + 25 = 223
25 + 10x + x2 = 223

Factor a perfect square on the left side:
(x + 5)(x + 5) = 223

Calculate the square root of the right side: 14.933184523

Break this problem into two subproblems by setting 
(x + 5) equal to 14.933184523 and -14.933184523.

Subproblem 1

x + 5 = 14.933184523 Simplifying x + 5 = 14.933184523 Reorder the terms: 5 + x = 14.933184523 Solving 5 + x = 14.933184523 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 14.933184523 + -5 Combine like terms: 5 + -5 = 0 0 + x = 14.933184523 + -5 x = 14.933184523 + -5 Combine like terms: 14.933184523 + -5 = 9.933184523 x = 9.933184523 Simplifying x = 9.933184523

Subproblem 2

x + 5 = -14.933184523 Simplifying x + 5 = -14.933184523 Reorder the terms: 5 + x = -14.933184523 Solving 5 + x = -14.933184523 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -14.933184523 + -5 Combine like terms: 5 + -5 = 0 0 + x = -14.933184523 + -5 x = -14.933184523 + -5 Combine like terms: -14.933184523 + -5 = -19.933184523 x = -19.933184523 Simplifying x = -19.933184523

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.933184523, -19.933184523}

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