.5c^2+2c+.75=0

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Solution for .5c^2+2c+.75=0 equation:


Simplifying
0.5c2 + 2c + 0.75 = 0

Reorder the terms:
0.75 + 2c + 0.5c2 = 0

Solving
0.75 + 2c + 0.5c2 = 0

Solving for variable 'c'.

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

Divide each side by '0.5'.
1.5 + 4c + c2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 4c + -1.5 + c2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 4c + c2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 4c + c2 = 0 + -1.5
4c + c2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
4c + c2 = -1.5

The c term is 4c.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4c + 4 + c2 = -1.5 + 4

Reorder the terms:
4 + 4c + c2 = -1.5 + 4

Combine like terms: -1.5 + 4 = 2.5
4 + 4c + c2 = 2.5

Factor a perfect square on the left side:
(c + 2)(c + 2) = 2.5

Calculate the square root of the right side: 1.58113883

Break this problem into two subproblems by setting 
(c + 2) equal to 1.58113883 and -1.58113883.

Subproblem 1

c + 2 = 1.58113883 Simplifying c + 2 = 1.58113883 Reorder the terms: 2 + c = 1.58113883 Solving 2 + c = 1.58113883 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + c = 1.58113883 + -2 Combine like terms: 2 + -2 = 0 0 + c = 1.58113883 + -2 c = 1.58113883 + -2 Combine like terms: 1.58113883 + -2 = -0.41886117 c = -0.41886117 Simplifying c = -0.41886117

Subproblem 2

c + 2 = -1.58113883 Simplifying c + 2 = -1.58113883 Reorder the terms: 2 + c = -1.58113883 Solving 2 + c = -1.58113883 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + c = -1.58113883 + -2 Combine like terms: 2 + -2 = 0 0 + c = -1.58113883 + -2 c = -1.58113883 + -2 Combine like terms: -1.58113883 + -2 = -3.58113883 c = -3.58113883 Simplifying c = -3.58113883

Solution

The solution to the problem is based on the solutions from the subproblems. c = {-0.41886117, -3.58113883}

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