2c(3+c)-7(c-2)=

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Solution for 2c(3+c)-7(c-2)= equation:


Simplifying
2c(3 + c) + -7(c + -2) = 0
(3 * 2c + c * 2c) + -7(c + -2) = 0
(6c + 2c2) + -7(c + -2) = 0

Reorder the terms:
6c + 2c2 + -7(-2 + c) = 0
6c + 2c2 + (-2 * -7 + c * -7) = 0
6c + 2c2 + (14 + -7c) = 0

Reorder the terms:
14 + 6c + -7c + 2c2 = 0

Combine like terms: 6c + -7c = -1c
14 + -1c + 2c2 = 0

Solving
14 + -1c + 2c2 = 0

Solving for variable 'c'.

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

Divide each side by '2'.
7 + -0.5c + c2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -0.5c + -7 + c2 = 0 + -7

Reorder the terms:
7 + -7 + -0.5c + c2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -0.5c + c2 = 0 + -7
-0.5c + c2 = 0 + -7

Combine like terms: 0 + -7 = -7
-0.5c + c2 = -7

The c term is -0.5c.  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.
-0.5c + 0.0625 + c2 = -7 + 0.0625

Reorder the terms:
0.0625 + -0.5c + c2 = -7 + 0.0625

Combine like terms: -7 + 0.0625 = -6.9375
0.0625 + -0.5c + c2 = -6.9375

Factor a perfect square on the left side:
(c + -0.25)(c + -0.25) = -6.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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