4x^2-31x+47=3x+2

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Solution for 4x^2-31x+47=3x+2 equation:


Simplifying
4x2 + -31x + 47 = 3x + 2

Reorder the terms:
47 + -31x + 4x2 = 3x + 2

Reorder the terms:
47 + -31x + 4x2 = 2 + 3x

Solving
47 + -31x + 4x2 = 2 + 3x

Solving for variable 'x'.

Reorder the terms:
47 + -2 + -31x + -3x + 4x2 = 2 + 3x + -2 + -3x

Combine like terms: 47 + -2 = 45
45 + -31x + -3x + 4x2 = 2 + 3x + -2 + -3x

Combine like terms: -31x + -3x = -34x
45 + -34x + 4x2 = 2 + 3x + -2 + -3x

Reorder the terms:
45 + -34x + 4x2 = 2 + -2 + 3x + -3x

Combine like terms: 2 + -2 = 0
45 + -34x + 4x2 = 0 + 3x + -3x
45 + -34x + 4x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
45 + -34x + 4x2 = 0

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

Divide each side by '4'.
11.25 + -8.5x + x2 = 0

Move the constant term to the right:

Add '-11.25' to each side of the equation.
11.25 + -8.5x + -11.25 + x2 = 0 + -11.25

Reorder the terms:
11.25 + -11.25 + -8.5x + x2 = 0 + -11.25

Combine like terms: 11.25 + -11.25 = 0.00
0.00 + -8.5x + x2 = 0 + -11.25
-8.5x + x2 = 0 + -11.25

Combine like terms: 0 + -11.25 = -11.25
-8.5x + x2 = -11.25

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = -11.25 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = -11.25 + 18.0625

Combine like terms: -11.25 + 18.0625 = 6.8125
18.0625 + -8.5x + x2 = 6.8125

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = 6.8125

Calculate the square root of the right side: 2.610076627

Break this problem into two subproblems by setting 
(x + -4.25) equal to 2.610076627 and -2.610076627.

Subproblem 1

x + -4.25 = 2.610076627 Simplifying x + -4.25 = 2.610076627 Reorder the terms: -4.25 + x = 2.610076627 Solving -4.25 + x = 2.610076627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = 2.610076627 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = 2.610076627 + 4.25 x = 2.610076627 + 4.25 Combine like terms: 2.610076627 + 4.25 = 6.860076627 x = 6.860076627 Simplifying x = 6.860076627

Subproblem 2

x + -4.25 = -2.610076627 Simplifying x + -4.25 = -2.610076627 Reorder the terms: -4.25 + x = -2.610076627 Solving -4.25 + x = -2.610076627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = -2.610076627 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = -2.610076627 + 4.25 x = -2.610076627 + 4.25 Combine like terms: -2.610076627 + 4.25 = 1.639923373 x = 1.639923373 Simplifying x = 1.639923373

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.860076627, 1.639923373}

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