5a^2+6a+9=0

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Solution for 5a^2+6a+9=0 equation:


Simplifying
5a2 + 6a + 9 = 0

Reorder the terms:
9 + 6a + 5a2 = 0

Solving
9 + 6a + 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'.
1.8 + 1.2a + a2 = 0

Move the constant term to the right:

Add '-1.8' to each side of the equation.
1.8 + 1.2a + -1.8 + a2 = 0 + -1.8

Reorder the terms:
1.8 + -1.8 + 1.2a + a2 = 0 + -1.8

Combine like terms: 1.8 + -1.8 = 0.0
0.0 + 1.2a + a2 = 0 + -1.8
1.2a + a2 = 0 + -1.8

Combine like terms: 0 + -1.8 = -1.8
1.2a + a2 = -1.8

The a term is 1.2a.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2a + 0.36 + a2 = -1.8 + 0.36

Reorder the terms:
0.36 + 1.2a + a2 = -1.8 + 0.36

Combine like terms: -1.8 + 0.36 = -1.44
0.36 + 1.2a + a2 = -1.44

Factor a perfect square on the left side:
(a + 0.6)(a + 0.6) = -1.44

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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