4a^2+3a+2.25=0

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Solution for 4a^2+3a+2.25=0 equation:


Simplifying
4a2 + 3a + 2.25 = 0

Reorder the terms:
2.25 + 3a + 4a2 = 0

Solving
2.25 + 3a + 4a2 = 0

Solving for variable 'a'.

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

Divide each side by '4'.
0.5625 + 0.75a + a2 = 0

Move the constant term to the right:

Add '-0.5625' to each side of the equation.
0.5625 + 0.75a + -0.5625 + a2 = 0 + -0.5625

Reorder the terms:
0.5625 + -0.5625 + 0.75a + a2 = 0 + -0.5625

Combine like terms: 0.5625 + -0.5625 = 0.0000
0.0000 + 0.75a + a2 = 0 + -0.5625
0.75a + a2 = 0 + -0.5625

Combine like terms: 0 + -0.5625 = -0.5625
0.75a + a2 = -0.5625

The a term is 0.75a.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75a + 0.140625 + a2 = -0.5625 + 0.140625

Reorder the terms:
0.140625 + 0.75a + a2 = -0.5625 + 0.140625

Combine like terms: -0.5625 + 0.140625 = -0.421875
0.140625 + 0.75a + a2 = -0.421875

Factor a perfect square on the left side:
(a + 0.375)(a + 0.375) = -0.421875

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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