(c^2-9c-5)-(-c^2-8c-10)=

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Solution for (c^2-9c-5)-(-c^2-8c-10)= equation:


Simplifying
(c2 + -9c + -5) + -1(-1c2 + -8c + -10) = 0

Reorder the terms:
(-5 + -9c + c2) + -1(-1c2 + -8c + -10) = 0

Remove parenthesis around (-5 + -9c + c2)
-5 + -9c + c2 + -1(-1c2 + -8c + -10) = 0

Reorder the terms:
-5 + -9c + c2 + -1(-10 + -8c + -1c2) = 0
-5 + -9c + c2 + (-10 * -1 + -8c * -1 + -1c2 * -1) = 0
-5 + -9c + c2 + (10 + 8c + 1c2) = 0

Reorder the terms:
-5 + 10 + -9c + 8c + c2 + 1c2 = 0

Combine like terms: -5 + 10 = 5
5 + -9c + 8c + c2 + 1c2 = 0

Combine like terms: -9c + 8c = -1c
5 + -1c + c2 + 1c2 = 0

Combine like terms: c2 + 1c2 = 2c2
5 + -1c + 2c2 = 0

Solving
5 + -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'.
2.5 + -0.5c + c2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + -0.5c + -2.5 + c2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + -0.5c + c2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -0.5c + c2 = 0 + -2.5
-0.5c + c2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
-0.5c + c2 = -2.5

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 = -2.5 + 0.0625

Reorder the terms:
0.0625 + -0.5c + c2 = -2.5 + 0.0625

Combine like terms: -2.5 + 0.0625 = -2.4375
0.0625 + -0.5c + c2 = -2.4375

Factor a perfect square on the left side:
(c + -0.25)(c + -0.25) = -2.4375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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