a^2+18a+59=9

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Solution for a^2+18a+59=9 equation:


Simplifying
a2 + 18a + 59 = 9

Reorder the terms:
59 + 18a + a2 = 9

Solving
59 + 18a + a2 = 9

Solving for variable 'a'.

Reorder the terms:
59 + -9 + 18a + a2 = 9 + -9

Combine like terms: 59 + -9 = 50
50 + 18a + a2 = 9 + -9

Combine like terms: 9 + -9 = 0
50 + 18a + a2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-50' to each side of the equation.
50 + 18a + -50 + a2 = 0 + -50

Reorder the terms:
50 + -50 + 18a + a2 = 0 + -50

Combine like terms: 50 + -50 = 0
0 + 18a + a2 = 0 + -50
18a + a2 = 0 + -50

Combine like terms: 0 + -50 = -50
18a + a2 = -50

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

Add '81' to each side of the equation.
18a + 81 + a2 = -50 + 81

Reorder the terms:
81 + 18a + a2 = -50 + 81

Combine like terms: -50 + 81 = 31
81 + 18a + a2 = 31

Factor a perfect square on the left side:
(a + 9)(a + 9) = 31

Calculate the square root of the right side: 5.567764363

Break this problem into two subproblems by setting 
(a + 9) equal to 5.567764363 and -5.567764363.

Subproblem 1

a + 9 = 5.567764363 Simplifying a + 9 = 5.567764363 Reorder the terms: 9 + a = 5.567764363 Solving 9 + a = 5.567764363 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + a = 5.567764363 + -9 Combine like terms: 9 + -9 = 0 0 + a = 5.567764363 + -9 a = 5.567764363 + -9 Combine like terms: 5.567764363 + -9 = -3.432235637 a = -3.432235637 Simplifying a = -3.432235637

Subproblem 2

a + 9 = -5.567764363 Simplifying a + 9 = -5.567764363 Reorder the terms: 9 + a = -5.567764363 Solving 9 + a = -5.567764363 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + a = -5.567764363 + -9 Combine like terms: 9 + -9 = 0 0 + a = -5.567764363 + -9 a = -5.567764363 + -9 Combine like terms: -5.567764363 + -9 = -14.567764363 a = -14.567764363 Simplifying a = -14.567764363

Solution

The solution to the problem is based on the solutions from the subproblems. a = {-3.432235637, -14.567764363}

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