8x^2-4x=2x-9

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Solution for 8x^2-4x=2x-9 equation:


Simplifying
8x2 + -4x = 2x + -9

Reorder the terms:
-4x + 8x2 = 2x + -9

Reorder the terms:
-4x + 8x2 = -9 + 2x

Solving
-4x + 8x2 = -9 + 2x

Solving for variable 'x'.

Reorder the terms:
9 + -4x + -2x + 8x2 = -9 + 2x + 9 + -2x

Combine like terms: -4x + -2x = -6x
9 + -6x + 8x2 = -9 + 2x + 9 + -2x

Reorder the terms:
9 + -6x + 8x2 = -9 + 9 + 2x + -2x

Combine like terms: -9 + 9 = 0
9 + -6x + 8x2 = 0 + 2x + -2x
9 + -6x + 8x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
9 + -6x + 8x2 = 0

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

Divide each side by '8'.
1.125 + -0.75x + x2 = 0

Move the constant term to the right:

Add '-1.125' to each side of the equation.
1.125 + -0.75x + -1.125 + x2 = 0 + -1.125

Reorder the terms:
1.125 + -1.125 + -0.75x + x2 = 0 + -1.125

Combine like terms: 1.125 + -1.125 = 0.000
0.000 + -0.75x + x2 = 0 + -1.125
-0.75x + x2 = 0 + -1.125

Combine like terms: 0 + -1.125 = -1.125
-0.75x + x2 = -1.125

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 = -1.125 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = -1.125 + 0.140625

Combine like terms: -1.125 + 0.140625 = -0.984375
0.140625 + -0.75x + x2 = -0.984375

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = -0.984375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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