2a^2+4a+5=0

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Solution for 2a^2+4a+5=0 equation:


Simplifying
2a2 + 4a + 5 = 0

Reorder the terms:
5 + 4a + 2a2 = 0

Solving
5 + 4a + 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'.
2.5 + 2a + a2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + 2a + -2.5 + a2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + 2a + a2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + 2a + a2 = 0 + -2.5
2a + a2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
2a + a2 = -2.5

The a term is 2a.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2a + 1 + a2 = -2.5 + 1

Reorder the terms:
1 + 2a + a2 = -2.5 + 1

Combine like terms: -2.5 + 1 = -1.5
1 + 2a + a2 = -1.5

Factor a perfect square on the left side:
(a + 1)(a + 1) = -1.5

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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