-4x^2+9x-8=0

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Solution for -4x^2+9x-8=0 equation:


Simplifying
-4x2 + 9x + -8 = 0

Reorder the terms:
-8 + 9x + -4x2 = 0

Solving
-8 + 9x + -4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
2 + -2.25x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -2.25x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -2.25x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -2.25x + x2 = 0 + -2
-2.25x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-2.25x + x2 = -2

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = -2 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = -2 + 1.265625

Combine like terms: -2 + 1.265625 = -0.734375
1.265625 + -2.25x + x2 = -0.734375

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = -0.734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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