12x-6+(5-x)x=4

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Solution for 12x-6+(5-x)x=4 equation:


Simplifying
12x + -6 + (5 + -1x) * x = 4

Reorder the terms for easier multiplication:
12x + -6 + x(5 + -1x) = 4
12x + -6 + (5 * x + -1x * x) = 4
12x + -6 + (5x + -1x2) = 4

Reorder the terms:
-6 + 12x + 5x + -1x2 = 4

Combine like terms: 12x + 5x = 17x
-6 + 17x + -1x2 = 4

Solving
-6 + 17x + -1x2 = 4

Solving for variable 'x'.

Reorder the terms:
-6 + -4 + 17x + -1x2 = 4 + -4

Combine like terms: -6 + -4 = -10
-10 + 17x + -1x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-10 + 17x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
10 + -17x + x2 = 0

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -17x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -17x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -17x + x2 = 0 + -10
-17x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-17x + x2 = -10

The x term is -17x.  Take half its coefficient (-8.5).
Square it (72.25) and add it to both sides.

Add '72.25' to each side of the equation.
-17x + 72.25 + x2 = -10 + 72.25

Reorder the terms:
72.25 + -17x + x2 = -10 + 72.25

Combine like terms: -10 + 72.25 = 62.25
72.25 + -17x + x2 = 62.25

Factor a perfect square on the left side:
(x + -8.5)(x + -8.5) = 62.25

Calculate the square root of the right side: 7.889866919

Break this problem into two subproblems by setting 
(x + -8.5) equal to 7.889866919 and -7.889866919.

Subproblem 1

x + -8.5 = 7.889866919 Simplifying x + -8.5 = 7.889866919 Reorder the terms: -8.5 + x = 7.889866919 Solving -8.5 + x = 7.889866919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + x = 7.889866919 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + x = 7.889866919 + 8.5 x = 7.889866919 + 8.5 Combine like terms: 7.889866919 + 8.5 = 16.389866919 x = 16.389866919 Simplifying x = 16.389866919

Subproblem 2

x + -8.5 = -7.889866919 Simplifying x + -8.5 = -7.889866919 Reorder the terms: -8.5 + x = -7.889866919 Solving -8.5 + x = -7.889866919 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.5' to each side of the equation. -8.5 + 8.5 + x = -7.889866919 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + x = -7.889866919 + 8.5 x = -7.889866919 + 8.5 Combine like terms: -7.889866919 + 8.5 = 0.610133081 x = 0.610133081 Simplifying x = 0.610133081

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.389866919, 0.610133081}

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