0=8x^2-9x+2

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Solution for 0=8x^2-9x+2 equation:


Simplifying
0 = 8x2 + -9x + 2

Reorder the terms:
0 = 2 + -9x + 8x2

Solving
0 = 2 + -9x + 8x2

Solving for variable 'x'.

Combine like terms: 0 + -2 = -2
-2 + 9x + -8x2 = 2 + -9x + 8x2 + -2 + 9x + -8x2

Reorder the terms:
-2 + 9x + -8x2 = 2 + -2 + -9x + 9x + 8x2 + -8x2

Combine like terms: 2 + -2 = 0
-2 + 9x + -8x2 = 0 + -9x + 9x + 8x2 + -8x2
-2 + 9x + -8x2 = -9x + 9x + 8x2 + -8x2

Combine like terms: -9x + 9x = 0
-2 + 9x + -8x2 = 0 + 8x2 + -8x2
-2 + 9x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
-2 + 9x + -8x2 = 0

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

Divide each side by '-8'.
0.25 + -1.125x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + -1.125x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + -1.125x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + -1.125x + x2 = 0 + -0.25
-1.125x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
-1.125x + x2 = -0.25

The x term is -1.125x.  Take half its coefficient (-0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
-1.125x + 0.31640625 + x2 = -0.25 + 0.31640625

Reorder the terms:
0.31640625 + -1.125x + x2 = -0.25 + 0.31640625

Combine like terms: -0.25 + 0.31640625 = 0.06640625
0.31640625 + -1.125x + x2 = 0.06640625

Factor a perfect square on the left side:
(x + -0.5625)(x + -0.5625) = 0.06640625

Calculate the square root of the right side: 0.257694102

Break this problem into two subproblems by setting 
(x + -0.5625) equal to 0.257694102 and -0.257694102.

Subproblem 1

x + -0.5625 = 0.257694102 Simplifying x + -0.5625 = 0.257694102 Reorder the terms: -0.5625 + x = 0.257694102 Solving -0.5625 + x = 0.257694102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = 0.257694102 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = 0.257694102 + 0.5625 x = 0.257694102 + 0.5625 Combine like terms: 0.257694102 + 0.5625 = 0.820194102 x = 0.820194102 Simplifying x = 0.820194102

Subproblem 2

x + -0.5625 = -0.257694102 Simplifying x + -0.5625 = -0.257694102 Reorder the terms: -0.5625 + x = -0.257694102 Solving -0.5625 + x = -0.257694102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = -0.257694102 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = -0.257694102 + 0.5625 x = -0.257694102 + 0.5625 Combine like terms: -0.257694102 + 0.5625 = 0.304805898 x = 0.304805898 Simplifying x = 0.304805898

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.820194102, 0.304805898}

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