=x^2-16x-38

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Solution for =x^2-16x-38 equation:


Simplifying
0 = x2 + -16x + -38

Reorder the terms:
0 = -38 + -16x + x2

Solving
0 = -38 + -16x + x2

Solving for variable 'x'.

Combine like terms: 0 + 38 = 38
38 + 16x + -1x2 = -38 + -16x + x2 + 38 + 16x + -1x2

Reorder the terms:
38 + 16x + -1x2 = -38 + 38 + -16x + 16x + x2 + -1x2

Combine like terms: -38 + 38 = 0
38 + 16x + -1x2 = 0 + -16x + 16x + x2 + -1x2
38 + 16x + -1x2 = -16x + 16x + x2 + -1x2

Combine like terms: -16x + 16x = 0
38 + 16x + -1x2 = 0 + x2 + -1x2
38 + 16x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
38 + 16x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-38 + -16x + x2 = 0

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + -16x + 38 + x2 = 0 + 38

Reorder the terms:
-38 + 38 + -16x + x2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + -16x + x2 = 0 + 38
-16x + x2 = 0 + 38

Combine like terms: 0 + 38 = 38
-16x + x2 = 38

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 = 38 + 64

Reorder the terms:
64 + -16x + x2 = 38 + 64

Combine like terms: 38 + 64 = 102
64 + -16x + x2 = 102

Factor a perfect square on the left side:
(x + -8)(x + -8) = 102

Calculate the square root of the right side: 10.099504938

Break this problem into two subproblems by setting 
(x + -8) equal to 10.099504938 and -10.099504938.

Subproblem 1

x + -8 = 10.099504938 Simplifying x + -8 = 10.099504938 Reorder the terms: -8 + x = 10.099504938 Solving -8 + x = 10.099504938 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 = 10.099504938 + 8 Combine like terms: -8 + 8 = 0 0 + x = 10.099504938 + 8 x = 10.099504938 + 8 Combine like terms: 10.099504938 + 8 = 18.099504938 x = 18.099504938 Simplifying x = 18.099504938

Subproblem 2

x + -8 = -10.099504938 Simplifying x + -8 = -10.099504938 Reorder the terms: -8 + x = -10.099504938 Solving -8 + x = -10.099504938 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 = -10.099504938 + 8 Combine like terms: -8 + 8 = 0 0 + x = -10.099504938 + 8 x = -10.099504938 + 8 Combine like terms: -10.099504938 + 8 = -2.099504938 x = -2.099504938 Simplifying x = -2.099504938

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.099504938, -2.099504938}

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