3a^2+11a+15=0

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Solution for 3a^2+11a+15=0 equation:


Simplifying
3a2 + 11a + 15 = 0

Reorder the terms:
15 + 11a + 3a2 = 0

Solving
15 + 11a + 3a2 = 0

Solving for variable 'a'.

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

Divide each side by '3'.
5 + 3.666666667a + a2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 3.666666667a + -5 + a2 = 0 + -5

Reorder the terms:
5 + -5 + 3.666666667a + a2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 3.666666667a + a2 = 0 + -5
3.666666667a + a2 = 0 + -5

Combine like terms: 0 + -5 = -5
3.666666667a + a2 = -5

The a term is 3.666666667a.  Take half its coefficient (1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
3.666666667a + 3.361111114 + a2 = -5 + 3.361111114

Reorder the terms:
3.361111114 + 3.666666667a + a2 = -5 + 3.361111114

Combine like terms: -5 + 3.361111114 = -1.638888886
3.361111114 + 3.666666667a + a2 = -1.638888886

Factor a perfect square on the left side:
(a + 1.833333334)(a + 1.833333334) = -1.638888886

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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