14a^2+21a+8=0

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Solution for 14a^2+21a+8=0 equation:


Simplifying
14a2 + 21a + 8 = 0

Reorder the terms:
8 + 21a + 14a2 = 0

Solving
8 + 21a + 14a2 = 0

Solving for variable 'a'.

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

Divide each side by '14'.
0.5714285714 + 1.5a + a2 = 0

Move the constant term to the right:

Add '-0.5714285714' to each side of the equation.
0.5714285714 + 1.5a + -0.5714285714 + a2 = 0 + -0.5714285714

Reorder the terms:
0.5714285714 + -0.5714285714 + 1.5a + a2 = 0 + -0.5714285714

Combine like terms: 0.5714285714 + -0.5714285714 = 0.0000000000
0.0000000000 + 1.5a + a2 = 0 + -0.5714285714
1.5a + a2 = 0 + -0.5714285714

Combine like terms: 0 + -0.5714285714 = -0.5714285714
1.5a + a2 = -0.5714285714

The a term is 1.5a.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5a + 0.5625 + a2 = -0.5714285714 + 0.5625

Reorder the terms:
0.5625 + 1.5a + a2 = -0.5714285714 + 0.5625

Combine like terms: -0.5714285714 + 0.5625 = -0.0089285714
0.5625 + 1.5a + a2 = -0.0089285714

Factor a perfect square on the left side:
(a + 0.75)(a + 0.75) = -0.0089285714

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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