x^2-8x+16=54

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Solution for x^2-8x+16=54 equation:


Simplifying
x2 + -8x + 16 = 54

Reorder the terms:
16 + -8x + x2 = 54

Solving
16 + -8x + x2 = 54

Solving for variable 'x'.

Reorder the terms:
16 + -54 + -8x + x2 = 54 + -54

Combine like terms: 16 + -54 = -38
-38 + -8x + x2 = 54 + -54

Combine like terms: 54 + -54 = 0
-38 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + -8x + 38 + x2 = 0 + 38

Reorder the terms:
-38 + 38 + -8x + x2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + -8x + x2 = 0 + 38
-8x + x2 = 0 + 38

Combine like terms: 0 + 38 = 38
-8x + x2 = 38

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 38 + 16

Reorder the terms:
16 + -8x + x2 = 38 + 16

Combine like terms: 38 + 16 = 54
16 + -8x + x2 = 54

Factor a perfect square on the left side:
(x + -4)(x + -4) = 54

Calculate the square root of the right side: 7.348469228

Break this problem into two subproblems by setting 
(x + -4) equal to 7.348469228 and -7.348469228.

Subproblem 1

x + -4 = 7.348469228 Simplifying x + -4 = 7.348469228 Reorder the terms: -4 + x = 7.348469228 Solving -4 + x = 7.348469228 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 7.348469228 + 4 Combine like terms: -4 + 4 = 0 0 + x = 7.348469228 + 4 x = 7.348469228 + 4 Combine like terms: 7.348469228 + 4 = 11.348469228 x = 11.348469228 Simplifying x = 11.348469228

Subproblem 2

x + -4 = -7.348469228 Simplifying x + -4 = -7.348469228 Reorder the terms: -4 + x = -7.348469228 Solving -4 + x = -7.348469228 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -7.348469228 + 4 Combine like terms: -4 + 4 = 0 0 + x = -7.348469228 + 4 x = -7.348469228 + 4 Combine like terms: -7.348469228 + 4 = -3.348469228 x = -3.348469228 Simplifying x = -3.348469228

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.348469228, -3.348469228}

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