.5x(x-4)=48

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Solution for .5x(x-4)=48 equation:


Simplifying
0.5x(x + -4) = 48

Reorder the terms:
0.5x(-4 + x) = 48
(-4 * 0.5x + x * 0.5x) = 48
(-2x + 0.5x2) = 48

Solving
-2x + 0.5x2 = 48

Solving for variable 'x'.

Reorder the terms:
-48 + -2x + 0.5x2 = 48 + -48

Combine like terms: 48 + -48 = 0
-48 + -2x + 0.5x2 = 0

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

Divide each side by '0.5'.
-96 + -4x + x2 = 0

Move the constant term to the right:

Add '96' to each side of the equation.
-96 + -4x + 96 + x2 = 0 + 96

Reorder the terms:
-96 + 96 + -4x + x2 = 0 + 96

Combine like terms: -96 + 96 = 0
0 + -4x + x2 = 0 + 96
-4x + x2 = 0 + 96

Combine like terms: 0 + 96 = 96
-4x + x2 = 96

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4x + 4 + x2 = 96 + 4

Reorder the terms:
4 + -4x + x2 = 96 + 4

Combine like terms: 96 + 4 = 100
4 + -4x + x2 = 100

Factor a perfect square on the left side:
(x + -2)(x + -2) = 100

Calculate the square root of the right side: 10

Break this problem into two subproblems by setting 
(x + -2) equal to 10 and -10.

Subproblem 1

x + -2 = 10 Simplifying x + -2 = 10 Reorder the terms: -2 + x = 10 Solving -2 + x = 10 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 10 + 2 Combine like terms: -2 + 2 = 0 0 + x = 10 + 2 x = 10 + 2 Combine like terms: 10 + 2 = 12 x = 12 Simplifying x = 12

Subproblem 2

x + -2 = -10 Simplifying x + -2 = -10 Reorder the terms: -2 + x = -10 Solving -2 + x = -10 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -10 + 2 Combine like terms: -2 + 2 = 0 0 + x = -10 + 2 x = -10 + 2 Combine like terms: -10 + 2 = -8 x = -8 Simplifying x = -8

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12, -8}

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