c^2+3c=-12

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Solution for c^2+3c=-12 equation:


Simplifying
c2 + 3c = -12

Reorder the terms:
3c + c2 = -12

Solving
3c + c2 = -12

Solving for variable 'c'.

Reorder the terms:
12 + 3c + c2 = -12 + 12

Combine like terms: -12 + 12 = 0
12 + 3c + c2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + 3c + -12 + c2 = 0 + -12

Reorder the terms:
12 + -12 + 3c + c2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 3c + c2 = 0 + -12
3c + c2 = 0 + -12

Combine like terms: 0 + -12 = -12
3c + c2 = -12

The c term is 3c.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3c + 2.25 + c2 = -12 + 2.25

Reorder the terms:
2.25 + 3c + c2 = -12 + 2.25

Combine like terms: -12 + 2.25 = -9.75
2.25 + 3c + c2 = -9.75

Factor a perfect square on the left side:
(c + 1.5)(c + 1.5) = -9.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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