x^2-16x=26

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Solution for x^2-16x=26 equation:


Simplifying
x2 + -16x = 26

Reorder the terms:
-16x + x2 = 26

Solving
-16x + x2 = 26

Solving for variable 'x'.

Reorder the terms:
-26 + -16x + x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-26 + -16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '26' to each side of the equation.
-26 + -16x + 26 + x2 = 0 + 26

Reorder the terms:
-26 + 26 + -16x + x2 = 0 + 26

Combine like terms: -26 + 26 = 0
0 + -16x + x2 = 0 + 26
-16x + x2 = 0 + 26

Combine like terms: 0 + 26 = 26
-16x + x2 = 26

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 = 26 + 64

Reorder the terms:
64 + -16x + x2 = 26 + 64

Combine like terms: 26 + 64 = 90
64 + -16x + x2 = 90

Factor a perfect square on the left side:
(x + -8)(x + -8) = 90

Calculate the square root of the right side: 9.486832981

Break this problem into two subproblems by setting 
(x + -8) equal to 9.486832981 and -9.486832981.

Subproblem 1

x + -8 = 9.486832981 Simplifying x + -8 = 9.486832981 Reorder the terms: -8 + x = 9.486832981 Solving -8 + x = 9.486832981 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 = 9.486832981 + 8 Combine like terms: -8 + 8 = 0 0 + x = 9.486832981 + 8 x = 9.486832981 + 8 Combine like terms: 9.486832981 + 8 = 17.486832981 x = 17.486832981 Simplifying x = 17.486832981

Subproblem 2

x + -8 = -9.486832981 Simplifying x + -8 = -9.486832981 Reorder the terms: -8 + x = -9.486832981 Solving -8 + x = -9.486832981 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 = -9.486832981 + 8 Combine like terms: -8 + 8 = 0 0 + x = -9.486832981 + 8 x = -9.486832981 + 8 Combine like terms: -9.486832981 + 8 = -1.486832981 x = -1.486832981 Simplifying x = -1.486832981

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.486832981, -1.486832981}

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