q^2+26q+9=0

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Solution for q^2+26q+9=0 equation:


Simplifying
q2 + 26q + 9 = 0

Reorder the terms:
9 + 26q + q2 = 0

Solving
9 + 26q + q2 = 0

Solving for variable 'q'.

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + 26q + -9 + q2 = 0 + -9

Reorder the terms:
9 + -9 + 26q + q2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 26q + q2 = 0 + -9
26q + q2 = 0 + -9

Combine like terms: 0 + -9 = -9
26q + q2 = -9

The q term is 26q.  Take half its coefficient (13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
26q + 169 + q2 = -9 + 169

Reorder the terms:
169 + 26q + q2 = -9 + 169

Combine like terms: -9 + 169 = 160
169 + 26q + q2 = 160

Factor a perfect square on the left side:
(q + 13)(q + 13) = 160

Calculate the square root of the right side: 12.649110641

Break this problem into two subproblems by setting 
(q + 13) equal to 12.649110641 and -12.649110641.

Subproblem 1

q + 13 = 12.649110641 Simplifying q + 13 = 12.649110641 Reorder the terms: 13 + q = 12.649110641 Solving 13 + q = 12.649110641 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + q = 12.649110641 + -13 Combine like terms: 13 + -13 = 0 0 + q = 12.649110641 + -13 q = 12.649110641 + -13 Combine like terms: 12.649110641 + -13 = -0.350889359 q = -0.350889359 Simplifying q = -0.350889359

Subproblem 2

q + 13 = -12.649110641 Simplifying q + 13 = -12.649110641 Reorder the terms: 13 + q = -12.649110641 Solving 13 + q = -12.649110641 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + q = -12.649110641 + -13 Combine like terms: 13 + -13 = 0 0 + q = -12.649110641 + -13 q = -12.649110641 + -13 Combine like terms: -12.649110641 + -13 = -25.649110641 q = -25.649110641 Simplifying q = -25.649110641

Solution

The solution to the problem is based on the solutions from the subproblems. q = {-0.350889359, -25.649110641}

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