2a^2-17a+40=0

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Solution for 2a^2-17a+40=0 equation:


Simplifying
2a2 + -17a + 40 = 0

Reorder the terms:
40 + -17a + 2a2 = 0

Solving
40 + -17a + 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'.
20 + -8.5a + a2 = 0

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + -8.5a + -20 + a2 = 0 + -20

Reorder the terms:
20 + -20 + -8.5a + a2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -8.5a + a2 = 0 + -20
-8.5a + a2 = 0 + -20

Combine like terms: 0 + -20 = -20
-8.5a + a2 = -20

The a term is -8.5a.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5a + 18.0625 + a2 = -20 + 18.0625

Reorder the terms:
18.0625 + -8.5a + a2 = -20 + 18.0625

Combine like terms: -20 + 18.0625 = -1.9375
18.0625 + -8.5a + a2 = -1.9375

Factor a perfect square on the left side:
(a + -4.25)(a + -4.25) = -1.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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