2x^2-11x+640=0

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Solution for 2x^2-11x+640=0 equation:


Simplifying
2x2 + -11x + 640 = 0

Reorder the terms:
640 + -11x + 2x2 = 0

Solving
640 + -11x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
320 + -5.5x + x2 = 0

Move the constant term to the right:

Add '-320' to each side of the equation.
320 + -5.5x + -320 + x2 = 0 + -320

Reorder the terms:
320 + -320 + -5.5x + x2 = 0 + -320

Combine like terms: 320 + -320 = 0
0 + -5.5x + x2 = 0 + -320
-5.5x + x2 = 0 + -320

Combine like terms: 0 + -320 = -320
-5.5x + x2 = -320

The x term is -5.5x.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5x + 7.5625 + x2 = -320 + 7.5625

Reorder the terms:
7.5625 + -5.5x + x2 = -320 + 7.5625

Combine like terms: -320 + 7.5625 = -312.4375
7.5625 + -5.5x + x2 = -312.4375

Factor a perfect square on the left side:
(x + -2.75)(x + -2.75) = -312.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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