x^2+18x+35=0

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Solution for x^2+18x+35=0 equation:


Simplifying
x2 + 18x + 35 = 0

Reorder the terms:
35 + 18x + x2 = 0

Solving
35 + 18x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-35' to each side of the equation.
35 + 18x + -35 + x2 = 0 + -35

Reorder the terms:
35 + -35 + 18x + x2 = 0 + -35

Combine like terms: 35 + -35 = 0
0 + 18x + x2 = 0 + -35
18x + x2 = 0 + -35

Combine like terms: 0 + -35 = -35
18x + x2 = -35

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 = -35 + 81

Reorder the terms:
81 + 18x + x2 = -35 + 81

Combine like terms: -35 + 81 = 46
81 + 18x + x2 = 46

Factor a perfect square on the left side:
(x + 9)(x + 9) = 46

Calculate the square root of the right side: 6.782329983

Break this problem into two subproblems by setting 
(x + 9) equal to 6.782329983 and -6.782329983.

Subproblem 1

x + 9 = 6.782329983 Simplifying x + 9 = 6.782329983 Reorder the terms: 9 + x = 6.782329983 Solving 9 + x = 6.782329983 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 = 6.782329983 + -9 Combine like terms: 9 + -9 = 0 0 + x = 6.782329983 + -9 x = 6.782329983 + -9 Combine like terms: 6.782329983 + -9 = -2.217670017 x = -2.217670017 Simplifying x = -2.217670017

Subproblem 2

x + 9 = -6.782329983 Simplifying x + 9 = -6.782329983 Reorder the terms: 9 + x = -6.782329983 Solving 9 + x = -6.782329983 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 = -6.782329983 + -9 Combine like terms: 9 + -9 = 0 0 + x = -6.782329983 + -9 x = -6.782329983 + -9 Combine like terms: -6.782329983 + -9 = -15.782329983 x = -15.782329983 Simplifying x = -15.782329983

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.217670017, -15.782329983}

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