8x^2-27x+8=0

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Solution for 8x^2-27x+8=0 equation:


Simplifying
8x2 + -27x + 8 = 0

Reorder the terms:
8 + -27x + 8x2 = 0

Solving
8 + -27x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
1 + -3.375x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -3.375x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -3.375x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -3.375x + x2 = 0 + -1
-3.375x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-3.375x + x2 = -1

The x term is -3.375x.  Take half its coefficient (-1.6875).
Square it (2.84765625) and add it to both sides.

Add '2.84765625' to each side of the equation.
-3.375x + 2.84765625 + x2 = -1 + 2.84765625

Reorder the terms:
2.84765625 + -3.375x + x2 = -1 + 2.84765625

Combine like terms: -1 + 2.84765625 = 1.84765625
2.84765625 + -3.375x + x2 = 1.84765625

Factor a perfect square on the left side:
(x + -1.6875)(x + -1.6875) = 1.84765625

Calculate the square root of the right side: 1.359285198

Break this problem into two subproblems by setting 
(x + -1.6875) equal to 1.359285198 and -1.359285198.

Subproblem 1

x + -1.6875 = 1.359285198 Simplifying x + -1.6875 = 1.359285198 Reorder the terms: -1.6875 + x = 1.359285198 Solving -1.6875 + x = 1.359285198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6875' to each side of the equation. -1.6875 + 1.6875 + x = 1.359285198 + 1.6875 Combine like terms: -1.6875 + 1.6875 = 0.0000 0.0000 + x = 1.359285198 + 1.6875 x = 1.359285198 + 1.6875 Combine like terms: 1.359285198 + 1.6875 = 3.046785198 x = 3.046785198 Simplifying x = 3.046785198

Subproblem 2

x + -1.6875 = -1.359285198 Simplifying x + -1.6875 = -1.359285198 Reorder the terms: -1.6875 + x = -1.359285198 Solving -1.6875 + x = -1.359285198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6875' to each side of the equation. -1.6875 + 1.6875 + x = -1.359285198 + 1.6875 Combine like terms: -1.6875 + 1.6875 = 0.0000 0.0000 + x = -1.359285198 + 1.6875 x = -1.359285198 + 1.6875 Combine like terms: -1.359285198 + 1.6875 = 0.328214802 x = 0.328214802 Simplifying x = 0.328214802

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.046785198, 0.328214802}

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