0.25x(x+4)=0.5

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Solution for 0.25x(x+4)=0.5 equation:


Simplifying
0.25x(x + 4) = 0.5

Reorder the terms:
0.25x(4 + x) = 0.5
(4 * 0.25x + x * 0.25x) = 0.5
(1x + 0.25x2) = 0.5

Solving
1x + 0.25x2 = 0.5

Solving for variable 'x'.

Reorder the terms:
-0.5 + 1x + 0.25x2 = 0.5 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
-0.5 + 1x + 0.25x2 = 0.0

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

Divide each side by '0.25'.
-2 + 4x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 4x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + 4x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 4x + x2 = 0 + 2
4x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
4x + x2 = 2

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 = 2 + 4

Reorder the terms:
4 + 4x + x2 = 2 + 4

Combine like terms: 2 + 4 = 6
4 + 4x + x2 = 6

Factor a perfect square on the left side:
(x + 2)(x + 2) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + 2) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + 2 = 2.449489743 Simplifying x + 2 = 2.449489743 Reorder the terms: 2 + x = 2.449489743 Solving 2 + x = 2.449489743 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 = 2.449489743 + -2 Combine like terms: 2 + -2 = 0 0 + x = 2.449489743 + -2 x = 2.449489743 + -2 Combine like terms: 2.449489743 + -2 = 0.449489743 x = 0.449489743 Simplifying x = 0.449489743

Subproblem 2

x + 2 = -2.449489743 Simplifying x + 2 = -2.449489743 Reorder the terms: 2 + x = -2.449489743 Solving 2 + x = -2.449489743 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 = -2.449489743 + -2 Combine like terms: 2 + -2 = 0 0 + x = -2.449489743 + -2 x = -2.449489743 + -2 Combine like terms: -2.449489743 + -2 = -4.449489743 x = -4.449489743 Simplifying x = -4.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.449489743, -4.449489743}

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