2w^2-9w+40=0

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Solution for 2w^2-9w+40=0 equation:


Simplifying
2w2 + -9w + 40 = 0

Reorder the terms:
40 + -9w + 2w2 = 0

Solving
40 + -9w + 2w2 = 0

Solving for variable 'w'.

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

Divide each side by '2'.
20 + -4.5w + w2 = 0

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + -4.5w + -20 + w2 = 0 + -20

Reorder the terms:
20 + -20 + -4.5w + w2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -4.5w + w2 = 0 + -20
-4.5w + w2 = 0 + -20

Combine like terms: 0 + -20 = -20
-4.5w + w2 = -20

The w term is -4.5w.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5w + 5.0625 + w2 = -20 + 5.0625

Reorder the terms:
5.0625 + -4.5w + w2 = -20 + 5.0625

Combine like terms: -20 + 5.0625 = -14.9375
5.0625 + -4.5w + w2 = -14.9375

Factor a perfect square on the left side:
(w + -2.25)(w + -2.25) = -14.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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