x^2+16x=19

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Solution for x^2+16x=19 equation:


Simplifying
x2 + 16x = 19

Reorder the terms:
16x + x2 = 19

Solving
16x + x2 = 19

Solving for variable 'x'.

Reorder the terms:
-19 + 16x + x2 = 19 + -19

Combine like terms: 19 + -19 = 0
-19 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + 16x + 19 + x2 = 0 + 19

Reorder the terms:
-19 + 19 + 16x + x2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + 16x + x2 = 0 + 19
16x + x2 = 0 + 19

Combine like terms: 0 + 19 = 19
16x + x2 = 19

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 = 19 + 64

Reorder the terms:
64 + 16x + x2 = 19 + 64

Combine like terms: 19 + 64 = 83
64 + 16x + x2 = 83

Factor a perfect square on the left side:
(x + 8)(x + 8) = 83

Calculate the square root of the right side: 9.110433579

Break this problem into two subproblems by setting 
(x + 8) equal to 9.110433579 and -9.110433579.

Subproblem 1

x + 8 = 9.110433579 Simplifying x + 8 = 9.110433579 Reorder the terms: 8 + x = 9.110433579 Solving 8 + x = 9.110433579 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 = 9.110433579 + -8 Combine like terms: 8 + -8 = 0 0 + x = 9.110433579 + -8 x = 9.110433579 + -8 Combine like terms: 9.110433579 + -8 = 1.110433579 x = 1.110433579 Simplifying x = 1.110433579

Subproblem 2

x + 8 = -9.110433579 Simplifying x + 8 = -9.110433579 Reorder the terms: 8 + x = -9.110433579 Solving 8 + x = -9.110433579 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 = -9.110433579 + -8 Combine like terms: 8 + -8 = 0 0 + x = -9.110433579 + -8 x = -9.110433579 + -8 Combine like terms: -9.110433579 + -8 = -17.110433579 x = -17.110433579 Simplifying x = -17.110433579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.110433579, -17.110433579}

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