5a^2+3a+12=0

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Solution for 5a^2+3a+12=0 equation:


Simplifying
5a2 + 3a + 12 = 0

Reorder the terms:
12 + 3a + 5a2 = 0

Solving
12 + 3a + 5a2 = 0

Solving for variable 'a'.

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

Divide each side by '5'.
2.4 + 0.6a + a2 = 0

Move the constant term to the right:

Add '-2.4' to each side of the equation.
2.4 + 0.6a + -2.4 + a2 = 0 + -2.4

Reorder the terms:
2.4 + -2.4 + 0.6a + a2 = 0 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + 0.6a + a2 = 0 + -2.4
0.6a + a2 = 0 + -2.4

Combine like terms: 0 + -2.4 = -2.4
0.6a + a2 = -2.4

The a term is 0.6a.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6a + 0.09 + a2 = -2.4 + 0.09

Reorder the terms:
0.09 + 0.6a + a2 = -2.4 + 0.09

Combine like terms: -2.4 + 0.09 = -2.31
0.09 + 0.6a + a2 = -2.31

Factor a perfect square on the left side:
(a + 0.3)(a + 0.3) = -2.31

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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