x^2-10x+28=64

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Solution for x^2-10x+28=64 equation:


Simplifying
x2 + -10x + 28 = 64

Reorder the terms:
28 + -10x + x2 = 64

Solving
28 + -10x + x2 = 64

Solving for variable 'x'.

Reorder the terms:
28 + -64 + -10x + x2 = 64 + -64

Combine like terms: 28 + -64 = -36
-36 + -10x + x2 = 64 + -64

Combine like terms: 64 + -64 = 0
-36 + -10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -10x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + -10x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -10x + x2 = 0 + 36
-10x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
-10x + x2 = 36

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 36 + 25

Reorder the terms:
25 + -10x + x2 = 36 + 25

Combine like terms: 36 + 25 = 61
25 + -10x + x2 = 61

Factor a perfect square on the left side:
(x + -5)(x + -5) = 61

Calculate the square root of the right side: 7.810249676

Break this problem into two subproblems by setting 
(x + -5) equal to 7.810249676 and -7.810249676.

Subproblem 1

x + -5 = 7.810249676 Simplifying x + -5 = 7.810249676 Reorder the terms: -5 + x = 7.810249676 Solving -5 + x = 7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 7.810249676 + 5 Combine like terms: -5 + 5 = 0 0 + x = 7.810249676 + 5 x = 7.810249676 + 5 Combine like terms: 7.810249676 + 5 = 12.810249676 x = 12.810249676 Simplifying x = 12.810249676

Subproblem 2

x + -5 = -7.810249676 Simplifying x + -5 = -7.810249676 Reorder the terms: -5 + x = -7.810249676 Solving -5 + x = -7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -7.810249676 + 5 Combine like terms: -5 + 5 = 0 0 + x = -7.810249676 + 5 x = -7.810249676 + 5 Combine like terms: -7.810249676 + 5 = -2.810249676 x = -2.810249676 Simplifying x = -2.810249676

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.810249676, -2.810249676}

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