2x^2-25x+84=0

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Solution for 2x^2-25x+84=0 equation:


Simplifying
2x2 + -25x + 84 = 0

Reorder the terms:
84 + -25x + 2x2 = 0

Solving
84 + -25x + 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'.
42 + -12.5x + x2 = 0

Move the constant term to the right:

Add '-42' to each side of the equation.
42 + -12.5x + -42 + x2 = 0 + -42

Reorder the terms:
42 + -42 + -12.5x + x2 = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -12.5x + x2 = 0 + -42
-12.5x + x2 = 0 + -42

Combine like terms: 0 + -42 = -42
-12.5x + x2 = -42

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = -42 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = -42 + 39.0625

Combine like terms: -42 + 39.0625 = -2.9375
39.0625 + -12.5x + x2 = -2.9375

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = -2.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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