4x^2+8x+3=20x+310

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Solution for 4x^2+8x+3=20x+310 equation:


Simplifying
4x2 + 8x + 3 = 20x + 310

Reorder the terms:
3 + 8x + 4x2 = 20x + 310

Reorder the terms:
3 + 8x + 4x2 = 310 + 20x

Solving
3 + 8x + 4x2 = 310 + 20x

Solving for variable 'x'.

Reorder the terms:
3 + -310 + 8x + -20x + 4x2 = 310 + 20x + -310 + -20x

Combine like terms: 3 + -310 = -307
-307 + 8x + -20x + 4x2 = 310 + 20x + -310 + -20x

Combine like terms: 8x + -20x = -12x
-307 + -12x + 4x2 = 310 + 20x + -310 + -20x

Reorder the terms:
-307 + -12x + 4x2 = 310 + -310 + 20x + -20x

Combine like terms: 310 + -310 = 0
-307 + -12x + 4x2 = 0 + 20x + -20x
-307 + -12x + 4x2 = 20x + -20x

Combine like terms: 20x + -20x = 0
-307 + -12x + 4x2 = 0

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

Divide each side by '4'.
-76.75 + -3x + x2 = 0

Move the constant term to the right:

Add '76.75' to each side of the equation.
-76.75 + -3x + 76.75 + x2 = 0 + 76.75

Reorder the terms:
-76.75 + 76.75 + -3x + x2 = 0 + 76.75

Combine like terms: -76.75 + 76.75 = 0.00
0.00 + -3x + x2 = 0 + 76.75
-3x + x2 = 0 + 76.75

Combine like terms: 0 + 76.75 = 76.75
-3x + x2 = 76.75

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 76.75 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 76.75 + 2.25

Combine like terms: 76.75 + 2.25 = 79
2.25 + -3x + x2 = 79

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 79

Calculate the square root of the right side: 8.888194417

Break this problem into two subproblems by setting 
(x + -1.5) equal to 8.888194417 and -8.888194417.

Subproblem 1

x + -1.5 = 8.888194417 Simplifying x + -1.5 = 8.888194417 Reorder the terms: -1.5 + x = 8.888194417 Solving -1.5 + x = 8.888194417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 8.888194417 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 8.888194417 + 1.5 x = 8.888194417 + 1.5 Combine like terms: 8.888194417 + 1.5 = 10.388194417 x = 10.388194417 Simplifying x = 10.388194417

Subproblem 2

x + -1.5 = -8.888194417 Simplifying x + -1.5 = -8.888194417 Reorder the terms: -1.5 + x = -8.888194417 Solving -1.5 + x = -8.888194417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -8.888194417 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -8.888194417 + 1.5 x = -8.888194417 + 1.5 Combine like terms: -8.888194417 + 1.5 = -7.388194417 x = -7.388194417 Simplifying x = -7.388194417

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.388194417, -7.388194417}

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