x^2+16x=346

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Solution for x^2+16x=346 equation:


Simplifying
x2 + 16x = 346

Reorder the terms:
16x + x2 = 346

Solving
16x + x2 = 346

Solving for variable 'x'.

Reorder the terms:
-346 + 16x + x2 = 346 + -346

Combine like terms: 346 + -346 = 0
-346 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '346' to each side of the equation.
-346 + 16x + 346 + x2 = 0 + 346

Reorder the terms:
-346 + 346 + 16x + x2 = 0 + 346

Combine like terms: -346 + 346 = 0
0 + 16x + x2 = 0 + 346
16x + x2 = 0 + 346

Combine like terms: 0 + 346 = 346
16x + x2 = 346

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 = 346 + 64

Reorder the terms:
64 + 16x + x2 = 346 + 64

Combine like terms: 346 + 64 = 410
64 + 16x + x2 = 410

Factor a perfect square on the left side:
(x + 8)(x + 8) = 410

Calculate the square root of the right side: 20.248456731

Break this problem into two subproblems by setting 
(x + 8) equal to 20.248456731 and -20.248456731.

Subproblem 1

x + 8 = 20.248456731 Simplifying x + 8 = 20.248456731 Reorder the terms: 8 + x = 20.248456731 Solving 8 + x = 20.248456731 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 = 20.248456731 + -8 Combine like terms: 8 + -8 = 0 0 + x = 20.248456731 + -8 x = 20.248456731 + -8 Combine like terms: 20.248456731 + -8 = 12.248456731 x = 12.248456731 Simplifying x = 12.248456731

Subproblem 2

x + 8 = -20.248456731 Simplifying x + 8 = -20.248456731 Reorder the terms: 8 + x = -20.248456731 Solving 8 + x = -20.248456731 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 = -20.248456731 + -8 Combine like terms: 8 + -8 = 0 0 + x = -20.248456731 + -8 x = -20.248456731 + -8 Combine like terms: -20.248456731 + -8 = -28.248456731 x = -28.248456731 Simplifying x = -28.248456731

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.248456731, -28.248456731}

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