0=0.5x^2-6x+7

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Solution for 0=0.5x^2-6x+7 equation:


Simplifying
0 = 0.5x2 + -6x + 7

Reorder the terms:
0 = 7 + -6x + 0.5x2

Solving
0 = 7 + -6x + 0.5x2

Solving for variable 'x'.

Combine like terms: 0 + -7 = -7
-7 + 6x + -0.5x2 = 7 + -6x + 0.5x2 + -7 + 6x + -0.5x2

Reorder the terms:
-7 + 6x + -0.5x2 = 7 + -7 + -6x + 6x + 0.5x2 + -0.5x2

Combine like terms: 7 + -7 = 0
-7 + 6x + -0.5x2 = 0 + -6x + 6x + 0.5x2 + -0.5x2
-7 + 6x + -0.5x2 = -6x + 6x + 0.5x2 + -0.5x2

Combine like terms: -6x + 6x = 0
-7 + 6x + -0.5x2 = 0 + 0.5x2 + -0.5x2
-7 + 6x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
-7 + 6x + -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'.
14 + -12x + x2 = 0

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + -12x + -14 + x2 = 0 + -14

Reorder the terms:
14 + -14 + -12x + x2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -12x + x2 = 0 + -14
-12x + x2 = 0 + -14

Combine like terms: 0 + -14 = -14
-12x + x2 = -14

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = -14 + 36

Reorder the terms:
36 + -12x + x2 = -14 + 36

Combine like terms: -14 + 36 = 22
36 + -12x + x2 = 22

Factor a perfect square on the left side:
(x + -6)(x + -6) = 22

Calculate the square root of the right side: 4.69041576

Break this problem into two subproblems by setting 
(x + -6) equal to 4.69041576 and -4.69041576.

Subproblem 1

x + -6 = 4.69041576 Simplifying x + -6 = 4.69041576 Reorder the terms: -6 + x = 4.69041576 Solving -6 + x = 4.69041576 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 4.69041576 + 6 Combine like terms: -6 + 6 = 0 0 + x = 4.69041576 + 6 x = 4.69041576 + 6 Combine like terms: 4.69041576 + 6 = 10.69041576 x = 10.69041576 Simplifying x = 10.69041576

Subproblem 2

x + -6 = -4.69041576 Simplifying x + -6 = -4.69041576 Reorder the terms: -6 + x = -4.69041576 Solving -6 + x = -4.69041576 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -4.69041576 + 6 Combine like terms: -6 + 6 = 0 0 + x = -4.69041576 + 6 x = -4.69041576 + 6 Combine like terms: -4.69041576 + 6 = 1.30958424 x = 1.30958424 Simplifying x = 1.30958424

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.69041576, 1.30958424}

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