0.5x*x-3x+18=14

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Solution for 0.5x*x-3x+18=14 equation:


Simplifying
0.5x * x + -3x + 18 = 14

Multiply x * x
0.5x2 + -3x + 18 = 14

Reorder the terms:
18 + -3x + 0.5x2 = 14

Solving
18 + -3x + 0.5x2 = 14

Solving for variable 'x'.

Reorder the terms:
18 + -14 + -3x + 0.5x2 = 14 + -14

Combine like terms: 18 + -14 = 4
4 + -3x + 0.5x2 = 14 + -14

Combine like terms: 14 + -14 = 0
4 + -3x + 0.5x2 = 0

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

Divide each side by '0.5'.
8 + -6x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + -6x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + -6x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -6x + x2 = 0 + -8
-6x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
-6x + x2 = -8

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -8 + 9

Reorder the terms:
9 + -6x + x2 = -8 + 9

Combine like terms: -8 + 9 = 1
9 + -6x + x2 = 1

Factor a perfect square on the left side:
(x + -3)(x + -3) = 1

Calculate the square root of the right side: 1

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

Subproblem 1

x + -3 = 1 Simplifying x + -3 = 1 Reorder the terms: -3 + x = 1 Solving -3 + x = 1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 1 + 3 Combine like terms: -3 + 3 = 0 0 + x = 1 + 3 x = 1 + 3 Combine like terms: 1 + 3 = 4 x = 4 Simplifying x = 4

Subproblem 2

x + -3 = -1 Simplifying x + -3 = -1 Reorder the terms: -3 + x = -1 Solving -3 + x = -1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -1 + 3 Combine like terms: -3 + 3 = 0 0 + x = -1 + 3 x = -1 + 3 Combine like terms: -1 + 3 = 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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