.25x^2-4x+12=0

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Solution for .25x^2-4x+12=0 equation:


Simplifying
0.25x2 + -4x + 12 = 0

Reorder the terms:
12 + -4x + 0.25x2 = 0

Solving
12 + -4x + 0.25x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.25'.
48 + -16x + x2 = 0

Move the constant term to the right:

Add '-48' to each side of the equation.
48 + -16x + -48 + x2 = 0 + -48

Reorder the terms:
48 + -48 + -16x + x2 = 0 + -48

Combine like terms: 48 + -48 = 0
0 + -16x + x2 = 0 + -48
-16x + x2 = 0 + -48

Combine like terms: 0 + -48 = -48
-16x + x2 = -48

The x term is -16x.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x + 64 + x2 = -48 + 64

Reorder the terms:
64 + -16x + x2 = -48 + 64

Combine like terms: -48 + 64 = 16
64 + -16x + x2 = 16

Factor a perfect square on the left side:
(x + -8)(x + -8) = 16

Calculate the square root of the right side: 4

Break this problem into two subproblems by setting 
(x + -8) equal to 4 and -4.

Subproblem 1

x + -8 = 4 Simplifying x + -8 = 4 Reorder the terms: -8 + x = 4 Solving -8 + x = 4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 4 + 8 Combine like terms: -8 + 8 = 0 0 + x = 4 + 8 x = 4 + 8 Combine like terms: 4 + 8 = 12 x = 12 Simplifying x = 12

Subproblem 2

x + -8 = -4 Simplifying x + -8 = -4 Reorder the terms: -8 + x = -4 Solving -8 + x = -4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -4 + 8 Combine like terms: -8 + 8 = 0 0 + x = -4 + 8 x = -4 + 8 Combine like terms: -4 + 8 = 4 x = 4 Simplifying x = 4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12, 4}

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