8a^2+9a=-6

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Solution for 8a^2+9a=-6 equation:


Simplifying
8a2 + 9a = -6

Reorder the terms:
9a + 8a2 = -6

Solving
9a + 8a2 = -6

Solving for variable 'a'.

Reorder the terms:
6 + 9a + 8a2 = -6 + 6

Combine like terms: -6 + 6 = 0
6 + 9a + 8a2 = 0

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

Divide each side by '8'.
0.75 + 1.125a + a2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + 1.125a + -0.75 + a2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + 1.125a + a2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + 1.125a + a2 = 0 + -0.75
1.125a + a2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
1.125a + a2 = -0.75

The a term is 1.125a.  Take half its coefficient (0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
1.125a + 0.31640625 + a2 = -0.75 + 0.31640625

Reorder the terms:
0.31640625 + 1.125a + a2 = -0.75 + 0.31640625

Combine like terms: -0.75 + 0.31640625 = -0.43359375
0.31640625 + 1.125a + a2 = -0.43359375

Factor a perfect square on the left side:
(a + 0.5625)(a + 0.5625) = -0.43359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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