0.25x^2=0.5x+2

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Solution for 0.25x^2=0.5x+2 equation:


Simplifying
0.25x2 = 0.5x + 2

Reorder the terms:
0.25x2 = 2 + 0.5x

Solving
0.25x2 = 2 + 0.5x

Solving for variable 'x'.

Reorder the terms:
-2 + -0.5x + 0.25x2 = 2 + 0.5x + -2 + -0.5x

Reorder the terms:
-2 + -0.5x + 0.25x2 = 2 + -2 + 0.5x + -0.5x

Combine like terms: 2 + -2 = 0
-2 + -0.5x + 0.25x2 = 0 + 0.5x + -0.5x
-2 + -0.5x + 0.25x2 = 0.5x + -0.5x

Combine like terms: 0.5x + -0.5x = 0.0
-2 + -0.5x + 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'.
-8 + -2x + x2 = 0

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + -2x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + -2x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -2x + x2 = 0 + 8
-2x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
-2x + x2 = 8

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 = 8 + 1

Reorder the terms:
1 + -2x + x2 = 8 + 1

Combine like terms: 8 + 1 = 9
1 + -2x + x2 = 9

Factor a perfect square on the left side:
(x + -1)(x + -1) = 9

Calculate the square root of the right side: 3

Break this problem into two subproblems by setting 
(x + -1) equal to 3 and -3.

Subproblem 1

x + -1 = 3 Simplifying x + -1 = 3 Reorder the terms: -1 + x = 3 Solving -1 + x = 3 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 + 1 Combine like terms: -1 + 1 = 0 0 + x = 3 + 1 x = 3 + 1 Combine like terms: 3 + 1 = 4 x = 4 Simplifying x = 4

Subproblem 2

x + -1 = -3 Simplifying x + -1 = -3 Reorder the terms: -1 + x = -3 Solving -1 + x = -3 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 + 1 Combine like terms: -1 + 1 = 0 0 + x = -3 + 1 x = -3 + 1 Combine like terms: -3 + 1 = -2 x = -2 Simplifying x = -2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4, -2}

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