5x(x-2)=32

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Solution for 5x(x-2)=32 equation:


Simplifying
5x(x + -2) = 32

Reorder the terms:
5x(-2 + x) = 32
(-2 * 5x + x * 5x) = 32
(-10x + 5x2) = 32

Solving
-10x + 5x2 = 32

Solving for variable 'x'.

Reorder the terms:
-32 + -10x + 5x2 = 32 + -32

Combine like terms: 32 + -32 = 0
-32 + -10x + 5x2 = 0

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

Divide each side by '5'.
-6.4 + -2x + x2 = 0

Move the constant term to the right:

Add '6.4' to each side of the equation.
-6.4 + -2x + 6.4 + x2 = 0 + 6.4

Reorder the terms:
-6.4 + 6.4 + -2x + x2 = 0 + 6.4

Combine like terms: -6.4 + 6.4 = 0.0
0.0 + -2x + x2 = 0 + 6.4
-2x + x2 = 0 + 6.4

Combine like terms: 0 + 6.4 = 6.4
-2x + x2 = 6.4

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 = 6.4 + 1

Reorder the terms:
1 + -2x + x2 = 6.4 + 1

Combine like terms: 6.4 + 1 = 7.4
1 + -2x + x2 = 7.4

Factor a perfect square on the left side:
(x + -1)(x + -1) = 7.4

Calculate the square root of the right side: 2.720294102

Break this problem into two subproblems by setting 
(x + -1) equal to 2.720294102 and -2.720294102.

Subproblem 1

x + -1 = 2.720294102 Simplifying x + -1 = 2.720294102 Reorder the terms: -1 + x = 2.720294102 Solving -1 + x = 2.720294102 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 = 2.720294102 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.720294102 + 1 x = 2.720294102 + 1 Combine like terms: 2.720294102 + 1 = 3.720294102 x = 3.720294102 Simplifying x = 3.720294102

Subproblem 2

x + -1 = -2.720294102 Simplifying x + -1 = -2.720294102 Reorder the terms: -1 + x = -2.720294102 Solving -1 + x = -2.720294102 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 = -2.720294102 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.720294102 + 1 x = -2.720294102 + 1 Combine like terms: -2.720294102 + 1 = -1.720294102 x = -1.720294102 Simplifying x = -1.720294102

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.720294102, -1.720294102}

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