x^2-16x+57=0

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Solution for x^2-16x+57=0 equation:


Simplifying
x2 + -16x + 57 = 0

Reorder the terms:
57 + -16x + x2 = 0

Solving
57 + -16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-57' to each side of the equation.
57 + -16x + -57 + x2 = 0 + -57

Reorder the terms:
57 + -57 + -16x + x2 = 0 + -57

Combine like terms: 57 + -57 = 0
0 + -16x + x2 = 0 + -57
-16x + x2 = 0 + -57

Combine like terms: 0 + -57 = -57
-16x + x2 = -57

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 = -57 + 64

Reorder the terms:
64 + -16x + x2 = -57 + 64

Combine like terms: -57 + 64 = 7
64 + -16x + x2 = 7

Factor a perfect square on the left side:
(x + -8)(x + -8) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(x + -8) equal to 2.645751311 and -2.645751311.

Subproblem 1

x + -8 = 2.645751311 Simplifying x + -8 = 2.645751311 Reorder the terms: -8 + x = 2.645751311 Solving -8 + x = 2.645751311 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 = 2.645751311 + 8 Combine like terms: -8 + 8 = 0 0 + x = 2.645751311 + 8 x = 2.645751311 + 8 Combine like terms: 2.645751311 + 8 = 10.645751311 x = 10.645751311 Simplifying x = 10.645751311

Subproblem 2

x + -8 = -2.645751311 Simplifying x + -8 = -2.645751311 Reorder the terms: -8 + x = -2.645751311 Solving -8 + x = -2.645751311 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 = -2.645751311 + 8 Combine like terms: -8 + 8 = 0 0 + x = -2.645751311 + 8 x = -2.645751311 + 8 Combine like terms: -2.645751311 + 8 = 5.354248689 x = 5.354248689 Simplifying x = 5.354248689

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.645751311, 5.354248689}

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