2a^2-9a+160=0

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Solution for 2a^2-9a+160=0 equation:


Simplifying
2a2 + -9a + 160 = 0

Reorder the terms:
160 + -9a + 2a2 = 0

Solving
160 + -9a + 2a2 = 0

Solving for variable 'a'.

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

Divide each side by '2'.
80 + -4.5a + a2 = 0

Move the constant term to the right:

Add '-80' to each side of the equation.
80 + -4.5a + -80 + a2 = 0 + -80

Reorder the terms:
80 + -80 + -4.5a + a2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -4.5a + a2 = 0 + -80
-4.5a + a2 = 0 + -80

Combine like terms: 0 + -80 = -80
-4.5a + a2 = -80

The a term is -4.5a.  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.
-4.5a + 5.0625 + a2 = -80 + 5.0625

Reorder the terms:
5.0625 + -4.5a + a2 = -80 + 5.0625

Combine like terms: -80 + 5.0625 = -74.9375
5.0625 + -4.5a + a2 = -74.9375

Factor a perfect square on the left side:
(a + -2.25)(a + -2.25) = -74.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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