(6c^2+2c-8)-(8c^2+c-13)=

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Solution for (6c^2+2c-8)-(8c^2+c-13)= equation:


Simplifying
(6c2 + 2c + -8) + -1(8c2 + c + -13) = 0

Reorder the terms:
(-8 + 2c + 6c2) + -1(8c2 + c + -13) = 0

Remove parenthesis around (-8 + 2c + 6c2)
-8 + 2c + 6c2 + -1(8c2 + c + -13) = 0

Reorder the terms:
-8 + 2c + 6c2 + -1(-13 + c + 8c2) = 0
-8 + 2c + 6c2 + (-13 * -1 + c * -1 + 8c2 * -1) = 0
-8 + 2c + 6c2 + (13 + -1c + -8c2) = 0

Reorder the terms:
-8 + 13 + 2c + -1c + 6c2 + -8c2 = 0

Combine like terms: -8 + 13 = 5
5 + 2c + -1c + 6c2 + -8c2 = 0

Combine like terms: 2c + -1c = 1c
5 + 1c + 6c2 + -8c2 = 0

Combine like terms: 6c2 + -8c2 = -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 = 2.5625
0.0625 + -0.5c + c2 = 2.5625

Factor a perfect square on the left side:
(c + -0.25)(c + -0.25) = 2.5625

Calculate the square root of the right side: 1.600781059

Break this problem into two subproblems by setting 
(c + -0.25) equal to 1.600781059 and -1.600781059.

Subproblem 1

c + -0.25 = 1.600781059 Simplifying c + -0.25 = 1.600781059 Reorder the terms: -0.25 + c = 1.600781059 Solving -0.25 + c = 1.600781059 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + c = 1.600781059 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + c = 1.600781059 + 0.25 c = 1.600781059 + 0.25 Combine like terms: 1.600781059 + 0.25 = 1.850781059 c = 1.850781059 Simplifying c = 1.850781059

Subproblem 2

c + -0.25 = -1.600781059 Simplifying c + -0.25 = -1.600781059 Reorder the terms: -0.25 + c = -1.600781059 Solving -0.25 + c = -1.600781059 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + c = -1.600781059 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + c = -1.600781059 + 0.25 c = -1.600781059 + 0.25 Combine like terms: -1.600781059 + 0.25 = -1.350781059 c = -1.350781059 Simplifying c = -1.350781059

Solution

The solution to the problem is based on the solutions from the subproblems. c = {1.850781059, -1.350781059}

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