-12x^2+18x+12=5

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Solution for -12x^2+18x+12=5 equation:


Simplifying
-12x2 + 18x + 12 = 5

Reorder the terms:
12 + 18x + -12x2 = 5

Solving
12 + 18x + -12x2 = 5

Solving for variable 'x'.

Reorder the terms:
12 + -5 + 18x + -12x2 = 5 + -5

Combine like terms: 12 + -5 = 7
7 + 18x + -12x2 = 5 + -5

Combine like terms: 5 + -5 = 0
7 + 18x + -12x2 = 0

Begin completing the square.  Divide all terms by
-12 the coefficient of the squared term: 

Divide each side by '-12'.
-0.5833333333 + -1.5x + x2 = 0

Move the constant term to the right:

Add '0.5833333333' to each side of the equation.
-0.5833333333 + -1.5x + 0.5833333333 + x2 = 0 + 0.5833333333

Reorder the terms:
-0.5833333333 + 0.5833333333 + -1.5x + x2 = 0 + 0.5833333333

Combine like terms: -0.5833333333 + 0.5833333333 = 0.0000000000
0.0000000000 + -1.5x + x2 = 0 + 0.5833333333
-1.5x + x2 = 0 + 0.5833333333

Combine like terms: 0 + 0.5833333333 = 0.5833333333
-1.5x + x2 = 0.5833333333

The x term is -1.5x.  Take half its coefficient (-0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
-1.5x + 0.5625 + x2 = 0.5833333333 + 0.5625

Reorder the terms:
0.5625 + -1.5x + x2 = 0.5833333333 + 0.5625

Combine like terms: 0.5833333333 + 0.5625 = 1.1458333333
0.5625 + -1.5x + x2 = 1.1458333333

Factor a perfect square on the left side:
(x + -0.75)(x + -0.75) = 1.1458333333

Calculate the square root of the right side: 1.070436048

Break this problem into two subproblems by setting 
(x + -0.75) equal to 1.070436048 and -1.070436048.

Subproblem 1

x + -0.75 = 1.070436048 Simplifying x + -0.75 = 1.070436048 Reorder the terms: -0.75 + x = 1.070436048 Solving -0.75 + x = 1.070436048 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 1.070436048 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 1.070436048 + 0.75 x = 1.070436048 + 0.75 Combine like terms: 1.070436048 + 0.75 = 1.820436048 x = 1.820436048 Simplifying x = 1.820436048

Subproblem 2

x + -0.75 = -1.070436048 Simplifying x + -0.75 = -1.070436048 Reorder the terms: -0.75 + x = -1.070436048 Solving -0.75 + x = -1.070436048 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -1.070436048 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -1.070436048 + 0.75 x = -1.070436048 + 0.75 Combine like terms: -1.070436048 + 0.75 = -0.320436048 x = -0.320436048 Simplifying x = -0.320436048

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.820436048, -0.320436048}

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