2x(x-3)+12=2(x+1)-3x+23

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Solution for 2x(x-3)+12=2(x+1)-3x+23 equation:


Simplifying
2x(x + -3) + 12 = 2(x + 1) + -3x + 23

Reorder the terms:
2x(-3 + x) + 12 = 2(x + 1) + -3x + 23
(-3 * 2x + x * 2x) + 12 = 2(x + 1) + -3x + 23
(-6x + 2x2) + 12 = 2(x + 1) + -3x + 23

Reorder the terms:
12 + -6x + 2x2 = 2(x + 1) + -3x + 23

Reorder the terms:
12 + -6x + 2x2 = 2(1 + x) + -3x + 23
12 + -6x + 2x2 = (1 * 2 + x * 2) + -3x + 23
12 + -6x + 2x2 = (2 + 2x) + -3x + 23

Reorder the terms:
12 + -6x + 2x2 = 2 + 23 + 2x + -3x

Combine like terms: 2 + 23 = 25
12 + -6x + 2x2 = 25 + 2x + -3x

Combine like terms: 2x + -3x = -1x
12 + -6x + 2x2 = 25 + -1x

Solving
12 + -6x + 2x2 = 25 + -1x

Solving for variable 'x'.

Reorder the terms:
12 + -25 + -6x + x + 2x2 = 25 + -1x + -25 + x

Combine like terms: 12 + -25 = -13
-13 + -6x + x + 2x2 = 25 + -1x + -25 + x

Combine like terms: -6x + x = -5x
-13 + -5x + 2x2 = 25 + -1x + -25 + x

Reorder the terms:
-13 + -5x + 2x2 = 25 + -25 + -1x + x

Combine like terms: 25 + -25 = 0
-13 + -5x + 2x2 = 0 + -1x + x
-13 + -5x + 2x2 = -1x + x

Combine like terms: -1x + x = 0
-13 + -5x + 2x2 = 0

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

Divide each side by '2'.
-6.5 + -2.5x + x2 = 0

Move the constant term to the right:

Add '6.5' to each side of the equation.
-6.5 + -2.5x + 6.5 + x2 = 0 + 6.5

Reorder the terms:
-6.5 + 6.5 + -2.5x + x2 = 0 + 6.5

Combine like terms: -6.5 + 6.5 = 0.0
0.0 + -2.5x + x2 = 0 + 6.5
-2.5x + x2 = 0 + 6.5

Combine like terms: 0 + 6.5 = 6.5
-2.5x + x2 = 6.5

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 6.5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 6.5 + 1.5625

Combine like terms: 6.5 + 1.5625 = 8.0625
1.5625 + -2.5x + x2 = 8.0625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 8.0625

Calculate the square root of the right side: 2.839454173

Break this problem into two subproblems by setting 
(x + -1.25) equal to 2.839454173 and -2.839454173.

Subproblem 1

x + -1.25 = 2.839454173 Simplifying x + -1.25 = 2.839454173 Reorder the terms: -1.25 + x = 2.839454173 Solving -1.25 + x = 2.839454173 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 2.839454173 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 2.839454173 + 1.25 x = 2.839454173 + 1.25 Combine like terms: 2.839454173 + 1.25 = 4.089454173 x = 4.089454173 Simplifying x = 4.089454173

Subproblem 2

x + -1.25 = -2.839454173 Simplifying x + -1.25 = -2.839454173 Reorder the terms: -1.25 + x = -2.839454173 Solving -1.25 + x = -2.839454173 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -2.839454173 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -2.839454173 + 1.25 x = -2.839454173 + 1.25 Combine like terms: -2.839454173 + 1.25 = -1.589454173 x = -1.589454173 Simplifying x = -1.589454173

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.089454173, -1.589454173}

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