x^2-45=10x

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Solution for x^2-45=10x equation:


Simplifying
x2 + -45 = 10x

Reorder the terms:
-45 + x2 = 10x

Solving
-45 + x2 = 10x

Solving for variable 'x'.

Reorder the terms:
-45 + -10x + x2 = 10x + -10x

Combine like terms: 10x + -10x = 0
-45 + -10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '45' to each side of the equation.
-45 + -10x + 45 + x2 = 0 + 45

Reorder the terms:
-45 + 45 + -10x + x2 = 0 + 45

Combine like terms: -45 + 45 = 0
0 + -10x + x2 = 0 + 45
-10x + x2 = 0 + 45

Combine like terms: 0 + 45 = 45
-10x + x2 = 45

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 = 45 + 25

Reorder the terms:
25 + -10x + x2 = 45 + 25

Combine like terms: 45 + 25 = 70
25 + -10x + x2 = 70

Factor a perfect square on the left side:
(x + -5)(x + -5) = 70

Calculate the square root of the right side: 8.366600265

Break this problem into two subproblems by setting 
(x + -5) equal to 8.366600265 and -8.366600265.

Subproblem 1

x + -5 = 8.366600265 Simplifying x + -5 = 8.366600265 Reorder the terms: -5 + x = 8.366600265 Solving -5 + x = 8.366600265 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 = 8.366600265 + 5 Combine like terms: -5 + 5 = 0 0 + x = 8.366600265 + 5 x = 8.366600265 + 5 Combine like terms: 8.366600265 + 5 = 13.366600265 x = 13.366600265 Simplifying x = 13.366600265

Subproblem 2

x + -5 = -8.366600265 Simplifying x + -5 = -8.366600265 Reorder the terms: -5 + x = -8.366600265 Solving -5 + x = -8.366600265 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 = -8.366600265 + 5 Combine like terms: -5 + 5 = 0 0 + x = -8.366600265 + 5 x = -8.366600265 + 5 Combine like terms: -8.366600265 + 5 = -3.366600265 x = -3.366600265 Simplifying x = -3.366600265

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.366600265, -3.366600265}

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