10x^2-93=20x

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Solution for 10x^2-93=20x equation:


Simplifying
10x2 + -93 = 20x

Reorder the terms:
-93 + 10x2 = 20x

Solving
-93 + 10x2 = 20x

Solving for variable 'x'.

Reorder the terms:
-93 + -20x + 10x2 = 20x + -20x

Combine like terms: 20x + -20x = 0
-93 + -20x + 10x2 = 0

Begin completing the square.  Divide all terms by
10 the coefficient of the squared term: 

Divide each side by '10'.
-9.3 + -2x + x2 = 0

Move the constant term to the right:

Add '9.3' to each side of the equation.
-9.3 + -2x + 9.3 + x2 = 0 + 9.3

Reorder the terms:
-9.3 + 9.3 + -2x + x2 = 0 + 9.3

Combine like terms: -9.3 + 9.3 = 0.0
0.0 + -2x + x2 = 0 + 9.3
-2x + x2 = 0 + 9.3

Combine like terms: 0 + 9.3 = 9.3
-2x + x2 = 9.3

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 9.3 + 1

Reorder the terms:
1 + -2x + x2 = 9.3 + 1

Combine like terms: 9.3 + 1 = 10.3
1 + -2x + x2 = 10.3

Factor a perfect square on the left side:
(x + -1)(x + -1) = 10.3

Calculate the square root of the right side: 3.209361307

Break this problem into two subproblems by setting 
(x + -1) equal to 3.209361307 and -3.209361307.

Subproblem 1

x + -1 = 3.209361307 Simplifying x + -1 = 3.209361307 Reorder the terms: -1 + x = 3.209361307 Solving -1 + x = 3.209361307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 3.209361307 + 1 Combine like terms: -1 + 1 = 0 0 + x = 3.209361307 + 1 x = 3.209361307 + 1 Combine like terms: 3.209361307 + 1 = 4.209361307 x = 4.209361307 Simplifying x = 4.209361307

Subproblem 2

x + -1 = -3.209361307 Simplifying x + -1 = -3.209361307 Reorder the terms: -1 + x = -3.209361307 Solving -1 + x = -3.209361307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -3.209361307 + 1 Combine like terms: -1 + 1 = 0 0 + x = -3.209361307 + 1 x = -3.209361307 + 1 Combine like terms: -3.209361307 + 1 = -2.209361307 x = -2.209361307 Simplifying x = -2.209361307

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.209361307, -2.209361307}

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