c^2-6c-25.3=2.5

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Solution for c^2-6c-25.3=2.5 equation:


Simplifying
c2 + -6c + -25.3 = 2.5

Reorder the terms:
-25.3 + -6c + c2 = 2.5

Solving
-25.3 + -6c + c2 = 2.5

Solving for variable 'c'.

Reorder the terms:
-25.3 + -2.5 + -6c + c2 = 2.5 + -2.5

Combine like terms: -25.3 + -2.5 = -27.8
-27.8 + -6c + c2 = 2.5 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
-27.8 + -6c + c2 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '27.8' to each side of the equation.
-27.8 + -6c + 27.8 + c2 = 0.0 + 27.8

Reorder the terms:
-27.8 + 27.8 + -6c + c2 = 0.0 + 27.8

Combine like terms: -27.8 + 27.8 = 0.0
0.0 + -6c + c2 = 0.0 + 27.8
-6c + c2 = 0.0 + 27.8

Combine like terms: 0.0 + 27.8 = 27.8
-6c + c2 = 27.8

The c term is -6c.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6c + 9 + c2 = 27.8 + 9

Reorder the terms:
9 + -6c + c2 = 27.8 + 9

Combine like terms: 27.8 + 9 = 36.8
9 + -6c + c2 = 36.8

Factor a perfect square on the left side:
(c + -3)(c + -3) = 36.8

Calculate the square root of the right side: 6.066300355

Break this problem into two subproblems by setting 
(c + -3) equal to 6.066300355 and -6.066300355.

Subproblem 1

c + -3 = 6.066300355 Simplifying c + -3 = 6.066300355 Reorder the terms: -3 + c = 6.066300355 Solving -3 + c = 6.066300355 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + c = 6.066300355 + 3 Combine like terms: -3 + 3 = 0 0 + c = 6.066300355 + 3 c = 6.066300355 + 3 Combine like terms: 6.066300355 + 3 = 9.066300355 c = 9.066300355 Simplifying c = 9.066300355

Subproblem 2

c + -3 = -6.066300355 Simplifying c + -3 = -6.066300355 Reorder the terms: -3 + c = -6.066300355 Solving -3 + c = -6.066300355 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + c = -6.066300355 + 3 Combine like terms: -3 + 3 = 0 0 + c = -6.066300355 + 3 c = -6.066300355 + 3 Combine like terms: -6.066300355 + 3 = -3.066300355 c = -3.066300355 Simplifying c = -3.066300355

Solution

The solution to the problem is based on the solutions from the subproblems. c = {9.066300355, -3.066300355}

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