x^2+18x=-60

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Solution for x^2+18x=-60 equation:


Simplifying
x2 + 18x = -60

Reorder the terms:
18x + x2 = -60

Solving
18x + x2 = -60

Solving for variable 'x'.

Reorder the terms:
60 + 18x + x2 = -60 + 60

Combine like terms: -60 + 60 = 0
60 + 18x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-60' to each side of the equation.
60 + 18x + -60 + x2 = 0 + -60

Reorder the terms:
60 + -60 + 18x + x2 = 0 + -60

Combine like terms: 60 + -60 = 0
0 + 18x + x2 = 0 + -60
18x + x2 = 0 + -60

Combine like terms: 0 + -60 = -60
18x + x2 = -60

The x term is 18x.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18x + 81 + x2 = -60 + 81

Reorder the terms:
81 + 18x + x2 = -60 + 81

Combine like terms: -60 + 81 = 21
81 + 18x + x2 = 21

Factor a perfect square on the left side:
(x + 9)(x + 9) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(x + 9) equal to 4.582575695 and -4.582575695.

Subproblem 1

x + 9 = 4.582575695 Simplifying x + 9 = 4.582575695 Reorder the terms: 9 + x = 4.582575695 Solving 9 + x = 4.582575695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 4.582575695 + -9 Combine like terms: 9 + -9 = 0 0 + x = 4.582575695 + -9 x = 4.582575695 + -9 Combine like terms: 4.582575695 + -9 = -4.417424305 x = -4.417424305 Simplifying x = -4.417424305

Subproblem 2

x + 9 = -4.582575695 Simplifying x + 9 = -4.582575695 Reorder the terms: 9 + x = -4.582575695 Solving 9 + x = -4.582575695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = -4.582575695 + -9 Combine like terms: 9 + -9 = 0 0 + x = -4.582575695 + -9 x = -4.582575695 + -9 Combine like terms: -4.582575695 + -9 = -13.582575695 x = -13.582575695 Simplifying x = -13.582575695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-4.417424305, -13.582575695}

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