-4x^2=-5x+8

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Solution for -4x^2=-5x+8 equation:


Simplifying
-4x2 = -5x + 8

Reorder the terms:
-4x2 = 8 + -5x

Solving
-4x2 = 8 + -5x

Solving for variable 'x'.

Reorder the terms:
-8 + 5x + -4x2 = 8 + -5x + -8 + 5x

Reorder the terms:
-8 + 5x + -4x2 = 8 + -8 + -5x + 5x

Combine like terms: 8 + -8 = 0
-8 + 5x + -4x2 = 0 + -5x + 5x
-8 + 5x + -4x2 = -5x + 5x

Combine like terms: -5x + 5x = 0
-8 + 5x + -4x2 = 0

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

Divide each side by '-4'.
2 + -1.25x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -1.25x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -1.25x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1.25x + x2 = 0 + -2
-1.25x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-1.25x + x2 = -2

The x term is -1.25x.  Take half its coefficient (-0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
-1.25x + 0.390625 + x2 = -2 + 0.390625

Reorder the terms:
0.390625 + -1.25x + x2 = -2 + 0.390625

Combine like terms: -2 + 0.390625 = -1.609375
0.390625 + -1.25x + x2 = -1.609375

Factor a perfect square on the left side:
(x + -0.625)(x + -0.625) = -1.609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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