-x(12-x)=38

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Solution for -x(12-x)=38 equation:


Simplifying
-1x(12 + -1x) = 38
(12 * -1x + -1x * -1x) = 38
(-12x + 1x2) = 38

Solving
-12x + 1x2 = 38

Solving for variable 'x'.

Reorder the terms:
-38 + -12x + 1x2 = 38 + -38

Combine like terms: 38 + -38 = 0
-38 + -12x + 1x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + -12x + 38 + x2 = 0 + 38

Reorder the terms:
-38 + 38 + -12x + x2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + -12x + x2 = 0 + 38
-12x + x2 = 0 + 38

Combine like terms: 0 + 38 = 38
-12x + x2 = 38

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 = 38 + 36

Reorder the terms:
36 + -12x + x2 = 38 + 36

Combine like terms: 38 + 36 = 74
36 + -12x + x2 = 74

Factor a perfect square on the left side:
(x + -6)(x + -6) = 74

Calculate the square root of the right side: 8.602325267

Break this problem into two subproblems by setting 
(x + -6) equal to 8.602325267 and -8.602325267.

Subproblem 1

x + -6 = 8.602325267 Simplifying x + -6 = 8.602325267 Reorder the terms: -6 + x = 8.602325267 Solving -6 + x = 8.602325267 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 = 8.602325267 + 6 Combine like terms: -6 + 6 = 0 0 + x = 8.602325267 + 6 x = 8.602325267 + 6 Combine like terms: 8.602325267 + 6 = 14.602325267 x = 14.602325267 Simplifying x = 14.602325267

Subproblem 2

x + -6 = -8.602325267 Simplifying x + -6 = -8.602325267 Reorder the terms: -6 + x = -8.602325267 Solving -6 + x = -8.602325267 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 = -8.602325267 + 6 Combine like terms: -6 + 6 = 0 0 + x = -8.602325267 + 6 x = -8.602325267 + 6 Combine like terms: -8.602325267 + 6 = -2.602325267 x = -2.602325267 Simplifying x = -2.602325267

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.602325267, -2.602325267}

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