=.5x^2-4x+12

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Solution for =.5x^2-4x+12 equation:


Simplifying
0 = 0.5x2 + -4x + 12

Reorder the terms:
0 = 12 + -4x + 0.5x2

Solving
0 = 12 + -4x + 0.5x2

Solving for variable 'x'.

Combine like terms: 0 + -12 = -12
-12 + 4x + -0.5x2 = 12 + -4x + 0.5x2 + -12 + 4x + -0.5x2

Reorder the terms:
-12 + 4x + -0.5x2 = 12 + -12 + -4x + 4x + 0.5x2 + -0.5x2

Combine like terms: 12 + -12 = 0
-12 + 4x + -0.5x2 = 0 + -4x + 4x + 0.5x2 + -0.5x2
-12 + 4x + -0.5x2 = -4x + 4x + 0.5x2 + -0.5x2

Combine like terms: -4x + 4x = 0
-12 + 4x + -0.5x2 = 0 + 0.5x2 + -0.5x2
-12 + 4x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
-12 + 4x + -0.5x2 = 0.0

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

Divide each side by '-0.5'.
24 + -8x + x2 = 0

Move the constant term to the right:

Add '-24' to each side of the equation.
24 + -8x + -24 + x2 = 0 + -24

Reorder the terms:
24 + -24 + -8x + x2 = 0 + -24

Combine like terms: 24 + -24 = 0
0 + -8x + x2 = 0 + -24
-8x + x2 = 0 + -24

Combine like terms: 0 + -24 = -24
-8x + x2 = -24

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -24 + 16

Reorder the terms:
16 + -8x + x2 = -24 + 16

Combine like terms: -24 + 16 = -8
16 + -8x + x2 = -8

Factor a perfect square on the left side:
(x + -4)(x + -4) = -8

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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