8a^2+4a=-7

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Solution for 8a^2+4a=-7 equation:


Simplifying
8a2 + 4a = -7

Reorder the terms:
4a + 8a2 = -7

Solving
4a + 8a2 = -7

Solving for variable 'a'.

Reorder the terms:
7 + 4a + 8a2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + 4a + 8a2 = 0

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

Divide each side by '8'.
0.875 + 0.5a + a2 = 0

Move the constant term to the right:

Add '-0.875' to each side of the equation.
0.875 + 0.5a + -0.875 + a2 = 0 + -0.875

Reorder the terms:
0.875 + -0.875 + 0.5a + a2 = 0 + -0.875

Combine like terms: 0.875 + -0.875 = 0.000
0.000 + 0.5a + a2 = 0 + -0.875
0.5a + a2 = 0 + -0.875

Combine like terms: 0 + -0.875 = -0.875
0.5a + a2 = -0.875

The a term is 0.5a.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5a + 0.0625 + a2 = -0.875 + 0.0625

Reorder the terms:
0.0625 + 0.5a + a2 = -0.875 + 0.0625

Combine like terms: -0.875 + 0.0625 = -0.8125
0.0625 + 0.5a + a2 = -0.8125

Factor a perfect square on the left side:
(a + 0.25)(a + 0.25) = -0.8125

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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