x^2+16x=112

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Solution for x^2+16x=112 equation:


Simplifying
x2 + 16x = 112

Reorder the terms:
16x + x2 = 112

Solving
16x + x2 = 112

Solving for variable 'x'.

Reorder the terms:
-112 + 16x + x2 = 112 + -112

Combine like terms: 112 + -112 = 0
-112 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '112' to each side of the equation.
-112 + 16x + 112 + x2 = 0 + 112

Reorder the terms:
-112 + 112 + 16x + x2 = 0 + 112

Combine like terms: -112 + 112 = 0
0 + 16x + x2 = 0 + 112
16x + x2 = 0 + 112

Combine like terms: 0 + 112 = 112
16x + x2 = 112

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 = 112 + 64

Reorder the terms:
64 + 16x + x2 = 112 + 64

Combine like terms: 112 + 64 = 176
64 + 16x + x2 = 176

Factor a perfect square on the left side:
(x + 8)(x + 8) = 176

Calculate the square root of the right side: 13.266499161

Break this problem into two subproblems by setting 
(x + 8) equal to 13.266499161 and -13.266499161.

Subproblem 1

x + 8 = 13.266499161 Simplifying x + 8 = 13.266499161 Reorder the terms: 8 + x = 13.266499161 Solving 8 + x = 13.266499161 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 = 13.266499161 + -8 Combine like terms: 8 + -8 = 0 0 + x = 13.266499161 + -8 x = 13.266499161 + -8 Combine like terms: 13.266499161 + -8 = 5.266499161 x = 5.266499161 Simplifying x = 5.266499161

Subproblem 2

x + 8 = -13.266499161 Simplifying x + 8 = -13.266499161 Reorder the terms: 8 + x = -13.266499161 Solving 8 + x = -13.266499161 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 = -13.266499161 + -8 Combine like terms: 8 + -8 = 0 0 + x = -13.266499161 + -8 x = -13.266499161 + -8 Combine like terms: -13.266499161 + -8 = -21.266499161 x = -21.266499161 Simplifying x = -21.266499161

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.266499161, -21.266499161}

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