3x^2-12x+23=4x^2+20x+5

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Solution for 3x^2-12x+23=4x^2+20x+5 equation:


Simplifying
3x2 + -12x + 23 = 4x2 + 20x + 5

Reorder the terms:
23 + -12x + 3x2 = 4x2 + 20x + 5

Reorder the terms:
23 + -12x + 3x2 = 5 + 20x + 4x2

Solving
23 + -12x + 3x2 = 5 + 20x + 4x2

Solving for variable 'x'.

Reorder the terms:
23 + -5 + -12x + -20x + 3x2 + -4x2 = 5 + 20x + 4x2 + -5 + -20x + -4x2

Combine like terms: 23 + -5 = 18
18 + -12x + -20x + 3x2 + -4x2 = 5 + 20x + 4x2 + -5 + -20x + -4x2

Combine like terms: -12x + -20x = -32x
18 + -32x + 3x2 + -4x2 = 5 + 20x + 4x2 + -5 + -20x + -4x2

Combine like terms: 3x2 + -4x2 = -1x2
18 + -32x + -1x2 = 5 + 20x + 4x2 + -5 + -20x + -4x2

Reorder the terms:
18 + -32x + -1x2 = 5 + -5 + 20x + -20x + 4x2 + -4x2

Combine like terms: 5 + -5 = 0
18 + -32x + -1x2 = 0 + 20x + -20x + 4x2 + -4x2
18 + -32x + -1x2 = 20x + -20x + 4x2 + -4x2

Combine like terms: 20x + -20x = 0
18 + -32x + -1x2 = 0 + 4x2 + -4x2
18 + -32x + -1x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
18 + -32x + -1x2 = 0

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

Divide each side by '-1'.
-18 + 32x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + 32x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + 32x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 32x + x2 = 0 + 18
32x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
32x + x2 = 18

The x term is 32x.  Take half its coefficient (16).
Square it (256) and add it to both sides.

Add '256' to each side of the equation.
32x + 256 + x2 = 18 + 256

Reorder the terms:
256 + 32x + x2 = 18 + 256

Combine like terms: 18 + 256 = 274
256 + 32x + x2 = 274

Factor a perfect square on the left side:
(x + 16)(x + 16) = 274

Calculate the square root of the right side: 16.552945357

Break this problem into two subproblems by setting 
(x + 16) equal to 16.552945357 and -16.552945357.

Subproblem 1

x + 16 = 16.552945357 Simplifying x + 16 = 16.552945357 Reorder the terms: 16 + x = 16.552945357 Solving 16 + x = 16.552945357 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + x = 16.552945357 + -16 Combine like terms: 16 + -16 = 0 0 + x = 16.552945357 + -16 x = 16.552945357 + -16 Combine like terms: 16.552945357 + -16 = 0.552945357 x = 0.552945357 Simplifying x = 0.552945357

Subproblem 2

x + 16 = -16.552945357 Simplifying x + 16 = -16.552945357 Reorder the terms: 16 + x = -16.552945357 Solving 16 + x = -16.552945357 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + x = -16.552945357 + -16 Combine like terms: 16 + -16 = 0 0 + x = -16.552945357 + -16 x = -16.552945357 + -16 Combine like terms: -16.552945357 + -16 = -32.552945357 x = -32.552945357 Simplifying x = -32.552945357

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.552945357, -32.552945357}

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