0=-0.2x^2+4x-4.4

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Solution for 0=-0.2x^2+4x-4.4 equation:


Simplifying
0 = -0.2x2 + 4x + -4.4

Reorder the terms:
0 = -4.4 + 4x + -0.2x2

Solving
0 = -4.4 + 4x + -0.2x2

Solving for variable 'x'.

Combine like terms: 0 + 4.4 = 4.4
4.4 + -4x + 0.2x2 = -4.4 + 4x + -0.2x2 + 4.4 + -4x + 0.2x2

Reorder the terms:
4.4 + -4x + 0.2x2 = -4.4 + 4.4 + 4x + -4x + -0.2x2 + 0.2x2

Combine like terms: -4.4 + 4.4 = 0.0
4.4 + -4x + 0.2x2 = 0.0 + 4x + -4x + -0.2x2 + 0.2x2
4.4 + -4x + 0.2x2 = 4x + -4x + -0.2x2 + 0.2x2

Combine like terms: 4x + -4x = 0
4.4 + -4x + 0.2x2 = 0 + -0.2x2 + 0.2x2
4.4 + -4x + 0.2x2 = -0.2x2 + 0.2x2

Combine like terms: -0.2x2 + 0.2x2 = 0.0
4.4 + -4x + 0.2x2 = 0.0

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

Divide each side by '0.2'.
22 + -20x + x2 = 0

Move the constant term to the right:

Add '-22' to each side of the equation.
22 + -20x + -22 + x2 = 0 + -22

Reorder the terms:
22 + -22 + -20x + x2 = 0 + -22

Combine like terms: 22 + -22 = 0
0 + -20x + x2 = 0 + -22
-20x + x2 = 0 + -22

Combine like terms: 0 + -22 = -22
-20x + x2 = -22

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = -22 + 100

Reorder the terms:
100 + -20x + x2 = -22 + 100

Combine like terms: -22 + 100 = 78
100 + -20x + x2 = 78

Factor a perfect square on the left side:
(x + -10)(x + -10) = 78

Calculate the square root of the right side: 8.831760866

Break this problem into two subproblems by setting 
(x + -10) equal to 8.831760866 and -8.831760866.

Subproblem 1

x + -10 = 8.831760866 Simplifying x + -10 = 8.831760866 Reorder the terms: -10 + x = 8.831760866 Solving -10 + x = 8.831760866 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 8.831760866 + 10 Combine like terms: -10 + 10 = 0 0 + x = 8.831760866 + 10 x = 8.831760866 + 10 Combine like terms: 8.831760866 + 10 = 18.831760866 x = 18.831760866 Simplifying x = 18.831760866

Subproblem 2

x + -10 = -8.831760866 Simplifying x + -10 = -8.831760866 Reorder the terms: -10 + x = -8.831760866 Solving -10 + x = -8.831760866 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -8.831760866 + 10 Combine like terms: -10 + 10 = 0 0 + x = -8.831760866 + 10 x = -8.831760866 + 10 Combine like terms: -8.831760866 + 10 = 1.168239134 x = 1.168239134 Simplifying x = 1.168239134

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.831760866, 1.168239134}

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