x(x-17)=126

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Solution for x(x-17)=126 equation:


Simplifying
x(x + -17) = 126

Reorder the terms:
x(-17 + x) = 126
(-17 * x + x * x) = 126
(-17x + x2) = 126

Solving
-17x + x2 = 126

Solving for variable 'x'.

Reorder the terms:
-126 + -17x + x2 = 126 + -126

Combine like terms: 126 + -126 = 0
-126 + -17x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '126' to each side of the equation.
-126 + -17x + 126 + x2 = 0 + 126

Reorder the terms:
-126 + 126 + -17x + x2 = 0 + 126

Combine like terms: -126 + 126 = 0
0 + -17x + x2 = 0 + 126
-17x + x2 = 0 + 126

Combine like terms: 0 + 126 = 126
-17x + x2 = 126

The x term is -17x.  Take half its coefficient (-8.5).
Square it (72.25) and add it to both sides.

Add '72.25' to each side of the equation.
-17x + 72.25 + x2 = 126 + 72.25

Reorder the terms:
72.25 + -17x + x2 = 126 + 72.25

Combine like terms: 126 + 72.25 = 198.25
72.25 + -17x + x2 = 198.25

Factor a perfect square on the left side:
(x + -8.5)(x + -8.5) = 198.25

Calculate the square root of the right side: 14.08012784

Break this problem into two subproblems by setting 
(x + -8.5) equal to 14.08012784 and -14.08012784.

Subproblem 1

x + -8.5 = 14.08012784 Simplifying x + -8.5 = 14.08012784 Reorder the terms: -8.5 + x = 14.08012784 Solving -8.5 + x = 14.08012784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + x = 14.08012784 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + x = 14.08012784 + 8.5 x = 14.08012784 + 8.5 Combine like terms: 14.08012784 + 8.5 = 22.58012784 x = 22.58012784 Simplifying x = 22.58012784

Subproblem 2

x + -8.5 = -14.08012784 Simplifying x + -8.5 = -14.08012784 Reorder the terms: -8.5 + x = -14.08012784 Solving -8.5 + x = -14.08012784 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + x = -14.08012784 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + x = -14.08012784 + 8.5 x = -14.08012784 + 8.5 Combine like terms: -14.08012784 + 8.5 = -5.58012784 x = -5.58012784 Simplifying x = -5.58012784

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.58012784, -5.58012784}

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