x^2-16x=23

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Solution for x^2-16x=23 equation:


Simplifying
x2 + -16x = 23

Reorder the terms:
-16x + x2 = 23

Solving
-16x + x2 = 23

Solving for variable 'x'.

Reorder the terms:
-23 + -16x + x2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + -16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '23' to each side of the equation.
-23 + -16x + 23 + x2 = 0 + 23

Reorder the terms:
-23 + 23 + -16x + x2 = 0 + 23

Combine like terms: -23 + 23 = 0
0 + -16x + x2 = 0 + 23
-16x + x2 = 0 + 23

Combine like terms: 0 + 23 = 23
-16x + x2 = 23

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 = 23 + 64

Reorder the terms:
64 + -16x + x2 = 23 + 64

Combine like terms: 23 + 64 = 87
64 + -16x + x2 = 87

Factor a perfect square on the left side:
(x + -8)(x + -8) = 87

Calculate the square root of the right side: 9.327379053

Break this problem into two subproblems by setting 
(x + -8) equal to 9.327379053 and -9.327379053.

Subproblem 1

x + -8 = 9.327379053 Simplifying x + -8 = 9.327379053 Reorder the terms: -8 + x = 9.327379053 Solving -8 + x = 9.327379053 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 = 9.327379053 + 8 Combine like terms: -8 + 8 = 0 0 + x = 9.327379053 + 8 x = 9.327379053 + 8 Combine like terms: 9.327379053 + 8 = 17.327379053 x = 17.327379053 Simplifying x = 17.327379053

Subproblem 2

x + -8 = -9.327379053 Simplifying x + -8 = -9.327379053 Reorder the terms: -8 + x = -9.327379053 Solving -8 + x = -9.327379053 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 = -9.327379053 + 8 Combine like terms: -8 + 8 = 0 0 + x = -9.327379053 + 8 x = -9.327379053 + 8 Combine like terms: -9.327379053 + 8 = -1.327379053 x = -1.327379053 Simplifying x = -1.327379053

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.327379053, -1.327379053}

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