7.4644+c^2-3.8638c=4

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Solution for 7.4644+c^2-3.8638c=4 equation:


Simplifying
7.4644 + c2 + -3.8638c = 4

Reorder the terms:
7.4644 + -3.8638c + c2 = 4

Solving
7.4644 + -3.8638c + c2 = 4

Solving for variable 'c'.

Reorder the terms:
7.4644 + -4 + -3.8638c + c2 = 4 + -4

Combine like terms: 7.4644 + -4 = 3.4644
3.4644 + -3.8638c + c2 = 4 + -4

Combine like terms: 4 + -4 = 0
3.4644 + -3.8638c + c2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3.4644' to each side of the equation.
3.4644 + -3.8638c + -3.4644 + c2 = 0 + -3.4644

Reorder the terms:
3.4644 + -3.4644 + -3.8638c + c2 = 0 + -3.4644

Combine like terms: 3.4644 + -3.4644 = 0.0000
0.0000 + -3.8638c + c2 = 0 + -3.4644
-3.8638c + c2 = 0 + -3.4644

Combine like terms: 0 + -3.4644 = -3.4644
-3.8638c + c2 = -3.4644

The c term is -3.8638c.  Take half its coefficient (-1.9319).
Square it (3.73223761) and add it to both sides.

Add '3.73223761' to each side of the equation.
-3.8638c + 3.73223761 + c2 = -3.4644 + 3.73223761

Reorder the terms:
3.73223761 + -3.8638c + c2 = -3.4644 + 3.73223761

Combine like terms: -3.4644 + 3.73223761 = 0.26783761
3.73223761 + -3.8638c + c2 = 0.26783761

Factor a perfect square on the left side:
(c + -1.9319)(c + -1.9319) = 0.26783761

Calculate the square root of the right side: 0.517530299

Break this problem into two subproblems by setting 
(c + -1.9319) equal to 0.517530299 and -0.517530299.

Subproblem 1

c + -1.9319 = 0.517530299 Simplifying c + -1.9319 = 0.517530299 Reorder the terms: -1.9319 + c = 0.517530299 Solving -1.9319 + c = 0.517530299 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1.9319' to each side of the equation. -1.9319 + 1.9319 + c = 0.517530299 + 1.9319 Combine like terms: -1.9319 + 1.9319 = 0.0000 0.0000 + c = 0.517530299 + 1.9319 c = 0.517530299 + 1.9319 Combine like terms: 0.517530299 + 1.9319 = 2.449430299 c = 2.449430299 Simplifying c = 2.449430299

Subproblem 2

c + -1.9319 = -0.517530299 Simplifying c + -1.9319 = -0.517530299 Reorder the terms: -1.9319 + c = -0.517530299 Solving -1.9319 + c = -0.517530299 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '1.9319' to each side of the equation. -1.9319 + 1.9319 + c = -0.517530299 + 1.9319 Combine like terms: -1.9319 + 1.9319 = 0.0000 0.0000 + c = -0.517530299 + 1.9319 c = -0.517530299 + 1.9319 Combine like terms: -0.517530299 + 1.9319 = 1.414369701 c = 1.414369701 Simplifying c = 1.414369701

Solution

The solution to the problem is based on the solutions from the subproblems. c = {2.449430299, 1.414369701}

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