4a^2+4a=-15

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Solution for 4a^2+4a=-15 equation:


Simplifying
4a2 + 4a = -15

Reorder the terms:
4a + 4a2 = -15

Solving
4a + 4a2 = -15

Solving for variable 'a'.

Reorder the terms:
15 + 4a + 4a2 = -15 + 15

Combine like terms: -15 + 15 = 0
15 + 4a + 4a2 = 0

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

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

Move the constant term to the right:

Add '-3.75' to each side of the equation.
3.75 + a + -3.75 + a2 = 0 + -3.75

Reorder the terms:
3.75 + -3.75 + a + a2 = 0 + -3.75

Combine like terms: 3.75 + -3.75 = 0.00
0.00 + a + a2 = 0 + -3.75
a + a2 = 0 + -3.75

Combine like terms: 0 + -3.75 = -3.75
a + a2 = -3.75

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

Add '0.25' to each side of the equation.
 + 0.25 + a2 = -3.75 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + a2 = -3.75 + 0.25

Combine like terms: -3.75 + 0.25 = -3.5
1.25 + a2 = -3.5

Factor a perfect square on the left side:
(a + 0.5)(a + 0.5) = -3.5

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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