8x^2=30+433x

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Solution for 8x^2=30+433x equation:


Simplifying
8x2 = 30 + 433x

Solving
8x2 = 30 + 433x

Solving for variable 'x'.

Reorder the terms:
-30 + -433x + 8x2 = 30 + 433x + -30 + -433x

Reorder the terms:
-30 + -433x + 8x2 = 30 + -30 + 433x + -433x

Combine like terms: 30 + -30 = 0
-30 + -433x + 8x2 = 0 + 433x + -433x
-30 + -433x + 8x2 = 433x + -433x

Combine like terms: 433x + -433x = 0
-30 + -433x + 8x2 = 0

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

Divide each side by '8'.
-3.75 + -54.125x + x2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + -54.125x + 3.75 + x2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + -54.125x + x2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + -54.125x + x2 = 0 + 3.75
-54.125x + x2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
-54.125x + x2 = 3.75

The x term is -54.125x.  Take half its coefficient (-27.0625).
Square it (732.3789063) and add it to both sides.

Add '732.3789063' to each side of the equation.
-54.125x + 732.3789063 + x2 = 3.75 + 732.3789063

Reorder the terms:
732.3789063 + -54.125x + x2 = 3.75 + 732.3789063

Combine like terms: 3.75 + 732.3789063 = 736.1289063
732.3789063 + -54.125x + x2 = 736.1289063

Factor a perfect square on the left side:
(x + -27.0625)(x + -27.0625) = 736.1289063

Calculate the square root of the right side: 27.131695603

Break this problem into two subproblems by setting 
(x + -27.0625) equal to 27.131695603 and -27.131695603.

Subproblem 1

x + -27.0625 = 27.131695603 Simplifying x + -27.0625 = 27.131695603 Reorder the terms: -27.0625 + x = 27.131695603 Solving -27.0625 + x = 27.131695603 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27.0625' to each side of the equation. -27.0625 + 27.0625 + x = 27.131695603 + 27.0625 Combine like terms: -27.0625 + 27.0625 = 0.0000 0.0000 + x = 27.131695603 + 27.0625 x = 27.131695603 + 27.0625 Combine like terms: 27.131695603 + 27.0625 = 54.194195603 x = 54.194195603 Simplifying x = 54.194195603

Subproblem 2

x + -27.0625 = -27.131695603 Simplifying x + -27.0625 = -27.131695603 Reorder the terms: -27.0625 + x = -27.131695603 Solving -27.0625 + x = -27.131695603 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27.0625' to each side of the equation. -27.0625 + 27.0625 + x = -27.131695603 + 27.0625 Combine like terms: -27.0625 + 27.0625 = 0.0000 0.0000 + x = -27.131695603 + 27.0625 x = -27.131695603 + 27.0625 Combine like terms: -27.131695603 + 27.0625 = -0.069195603 x = -0.069195603 Simplifying x = -0.069195603

Solution

The solution to the problem is based on the solutions from the subproblems. x = {54.194195603, -0.069195603}

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