x^2+16x=305

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Solution for x^2+16x=305 equation:


Simplifying
x2 + 16x = 305

Reorder the terms:
16x + x2 = 305

Solving
16x + x2 = 305

Solving for variable 'x'.

Reorder the terms:
-305 + 16x + x2 = 305 + -305

Combine like terms: 305 + -305 = 0
-305 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '305' to each side of the equation.
-305 + 16x + 305 + x2 = 0 + 305

Reorder the terms:
-305 + 305 + 16x + x2 = 0 + 305

Combine like terms: -305 + 305 = 0
0 + 16x + x2 = 0 + 305
16x + x2 = 0 + 305

Combine like terms: 0 + 305 = 305
16x + x2 = 305

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = 305 + 64

Reorder the terms:
64 + 16x + x2 = 305 + 64

Combine like terms: 305 + 64 = 369
64 + 16x + x2 = 369

Factor a perfect square on the left side:
(x + 8)(x + 8) = 369

Calculate the square root of the right side: 19.209372712

Break this problem into two subproblems by setting 
(x + 8) equal to 19.209372712 and -19.209372712.

Subproblem 1

x + 8 = 19.209372712 Simplifying x + 8 = 19.209372712 Reorder the terms: 8 + x = 19.209372712 Solving 8 + x = 19.209372712 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 19.209372712 + -8 Combine like terms: 8 + -8 = 0 0 + x = 19.209372712 + -8 x = 19.209372712 + -8 Combine like terms: 19.209372712 + -8 = 11.209372712 x = 11.209372712 Simplifying x = 11.209372712

Subproblem 2

x + 8 = -19.209372712 Simplifying x + 8 = -19.209372712 Reorder the terms: 8 + x = -19.209372712 Solving 8 + x = -19.209372712 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -19.209372712 + -8 Combine like terms: 8 + -8 = 0 0 + x = -19.209372712 + -8 x = -19.209372712 + -8 Combine like terms: -19.209372712 + -8 = -27.209372712 x = -27.209372712 Simplifying x = -27.209372712

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.209372712, -27.209372712}

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