8x^2=3-6x

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Solution for 8x^2=3-6x equation:


Simplifying
8x2 = 3 + -6x

Solving
8x2 = 3 + -6x

Solving for variable 'x'.

Reorder the terms:
-3 + 6x + 8x2 = 3 + -6x + -3 + 6x

Reorder the terms:
-3 + 6x + 8x2 = 3 + -3 + -6x + 6x

Combine like terms: 3 + -3 = 0
-3 + 6x + 8x2 = 0 + -6x + 6x
-3 + 6x + 8x2 = -6x + 6x

Combine like terms: -6x + 6x = 0
-3 + 6x + 8x2 = 0

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

Divide each side by '8'.
-0.375 + 0.75x + x2 = 0

Move the constant term to the right:

Add '0.375' to each side of the equation.
-0.375 + 0.75x + 0.375 + x2 = 0 + 0.375

Reorder the terms:
-0.375 + 0.375 + 0.75x + x2 = 0 + 0.375

Combine like terms: -0.375 + 0.375 = 0.000
0.000 + 0.75x + x2 = 0 + 0.375
0.75x + x2 = 0 + 0.375

Combine like terms: 0 + 0.375 = 0.375
0.75x + x2 = 0.375

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = 0.375 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = 0.375 + 0.140625

Combine like terms: 0.375 + 0.140625 = 0.515625
0.140625 + 0.75x + x2 = 0.515625

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 0.515625

Calculate the square root of the right side: 0.718070331

Break this problem into two subproblems by setting 
(x + 0.375) equal to 0.718070331 and -0.718070331.

Subproblem 1

x + 0.375 = 0.718070331 Simplifying x + 0.375 = 0.718070331 Reorder the terms: 0.375 + x = 0.718070331 Solving 0.375 + x = 0.718070331 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 0.718070331 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 0.718070331 + -0.375 x = 0.718070331 + -0.375 Combine like terms: 0.718070331 + -0.375 = 0.343070331 x = 0.343070331 Simplifying x = 0.343070331

Subproblem 2

x + 0.375 = -0.718070331 Simplifying x + 0.375 = -0.718070331 Reorder the terms: 0.375 + x = -0.718070331 Solving 0.375 + x = -0.718070331 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -0.718070331 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -0.718070331 + -0.375 x = -0.718070331 + -0.375 Combine like terms: -0.718070331 + -0.375 = -1.093070331 x = -1.093070331 Simplifying x = -1.093070331

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.343070331, -1.093070331}

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