x^2-4x+16=169

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Solution for x^2-4x+16=169 equation:


Simplifying
x2 + -4x + 16 = 169

Reorder the terms:
16 + -4x + x2 = 169

Solving
16 + -4x + x2 = 169

Solving for variable 'x'.

Reorder the terms:
16 + -169 + -4x + x2 = 169 + -169

Combine like terms: 16 + -169 = -153
-153 + -4x + x2 = 169 + -169

Combine like terms: 169 + -169 = 0
-153 + -4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '153' to each side of the equation.
-153 + -4x + 153 + x2 = 0 + 153

Reorder the terms:
-153 + 153 + -4x + x2 = 0 + 153

Combine like terms: -153 + 153 = 0
0 + -4x + x2 = 0 + 153
-4x + x2 = 0 + 153

Combine like terms: 0 + 153 = 153
-4x + x2 = 153

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 153 + 4

Reorder the terms:
4 + -4x + x2 = 153 + 4

Combine like terms: 153 + 4 = 157
4 + -4x + x2 = 157

Factor a perfect square on the left side:
(x + -2)(x + -2) = 157

Calculate the square root of the right side: 12.529964086

Break this problem into two subproblems by setting 
(x + -2) equal to 12.529964086 and -12.529964086.

Subproblem 1

x + -2 = 12.529964086 Simplifying x + -2 = 12.529964086 Reorder the terms: -2 + x = 12.529964086 Solving -2 + x = 12.529964086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 12.529964086 + 2 Combine like terms: -2 + 2 = 0 0 + x = 12.529964086 + 2 x = 12.529964086 + 2 Combine like terms: 12.529964086 + 2 = 14.529964086 x = 14.529964086 Simplifying x = 14.529964086

Subproblem 2

x + -2 = -12.529964086 Simplifying x + -2 = -12.529964086 Reorder the terms: -2 + x = -12.529964086 Solving -2 + x = -12.529964086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -12.529964086 + 2 Combine like terms: -2 + 2 = 0 0 + x = -12.529964086 + 2 x = -12.529964086 + 2 Combine like terms: -12.529964086 + 2 = -10.529964086 x = -10.529964086 Simplifying x = -10.529964086

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.529964086, -10.529964086}

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