2c(2c)-7c=-5

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Solution for 2c(2c)-7c=-5 equation:


Simplifying
2c(2c) + -7c = -5

Remove parenthesis around (2c)
2c * 2c + -7c = -5

Reorder the terms for easier multiplication:
2 * 2c * c + -7c = -5

Multiply 2 * 2
4c * c + -7c = -5

Multiply c * c
4c2 + -7c = -5

Reorder the terms:
-7c + 4c2 = -5

Solving
-7c + 4c2 = -5

Solving for variable 'c'.

Reorder the terms:
5 + -7c + 4c2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + -7c + 4c2 = 0

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

Divide each side by '4'.
1.25 + -1.75c + c2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + -1.75c + -1.25 + c2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + -1.75c + c2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + -1.75c + c2 = 0 + -1.25
-1.75c + c2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
-1.75c + c2 = -1.25

The c term is -1.75c.  Take half its coefficient (-0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
-1.75c + 0.765625 + c2 = -1.25 + 0.765625

Reorder the terms:
0.765625 + -1.75c + c2 = -1.25 + 0.765625

Combine like terms: -1.25 + 0.765625 = -0.484375
0.765625 + -1.75c + c2 = -0.484375

Factor a perfect square on the left side:
(c + -0.875)(c + -0.875) = -0.484375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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