c^2+7c+18=0

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Solution for c^2+7c+18=0 equation:


Simplifying
c2 + 7c + 18 = 0

Reorder the terms:
18 + 7c + c2 = 0

Solving
18 + 7c + c2 = 0

Solving for variable 'c'.

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + 7c + -18 + c2 = 0 + -18

Reorder the terms:
18 + -18 + 7c + c2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 7c + c2 = 0 + -18
7c + c2 = 0 + -18

Combine like terms: 0 + -18 = -18
7c + c2 = -18

The c term is 7c.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7c + 12.25 + c2 = -18 + 12.25

Reorder the terms:
12.25 + 7c + c2 = -18 + 12.25

Combine like terms: -18 + 12.25 = -5.75
12.25 + 7c + c2 = -5.75

Factor a perfect square on the left side:
(c + 3.5)(c + 3.5) = -5.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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