5.5x^2+x-1.1=4x(3-x)

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Solution for 5.5x^2+x-1.1=4x(3-x) equation:


Simplifying
5.5x2 + x + -1.1 = 4x(3 + -1x)

Reorder the terms:
-1.1 + x + 5.5x2 = 4x(3 + -1x)
-1.1 + x + 5.5x2 = (3 * 4x + -1x * 4x)
-1.1 + x + 5.5x2 = (12x + -4x2)

Solving
-1.1 + x + 5.5x2 = 12x + -4x2

Solving for variable 'x'.

Reorder the terms:
-1.1 + x + -12x + 5.5x2 + 4x2 = 12x + -4x2 + -12x + 4x2

Combine like terms: x + -12x = -11x
-1.1 + -11x + 5.5x2 + 4x2 = 12x + -4x2 + -12x + 4x2

Combine like terms: 5.5x2 + 4x2 = 9.5x2
-1.1 + -11x + 9.5x2 = 12x + -4x2 + -12x + 4x2

Reorder the terms:
-1.1 + -11x + 9.5x2 = 12x + -12x + -4x2 + 4x2

Combine like terms: 12x + -12x = 0
-1.1 + -11x + 9.5x2 = 0 + -4x2 + 4x2
-1.1 + -11x + 9.5x2 = -4x2 + 4x2

Combine like terms: -4x2 + 4x2 = 0
-1.1 + -11x + 9.5x2 = 0

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

Divide each side by '9.5'.
-0.1157894737 + -1.157894737x + x2 = 0

Move the constant term to the right:

Add '0.1157894737' to each side of the equation.
-0.1157894737 + -1.157894737x + 0.1157894737 + x2 = 0 + 0.1157894737

Reorder the terms:
-0.1157894737 + 0.1157894737 + -1.157894737x + x2 = 0 + 0.1157894737

Combine like terms: -0.1157894737 + 0.1157894737 = 0.0000000000
0.0000000000 + -1.157894737x + x2 = 0 + 0.1157894737
-1.157894737x + x2 = 0 + 0.1157894737

Combine like terms: 0 + 0.1157894737 = 0.1157894737
-1.157894737x + x2 = 0.1157894737

The x term is -1.157894737x.  Take half its coefficient (-0.5789473685).
Square it (0.3351800555) and add it to both sides.

Add '0.3351800555' to each side of the equation.
-1.157894737x + 0.3351800555 + x2 = 0.1157894737 + 0.3351800555

Reorder the terms:
0.3351800555 + -1.157894737x + x2 = 0.1157894737 + 0.3351800555

Combine like terms: 0.1157894737 + 0.3351800555 = 0.4509695292
0.3351800555 + -1.157894737x + x2 = 0.4509695292

Factor a perfect square on the left side:
(x + -0.5789473685)(x + -0.5789473685) = 0.4509695292

Calculate the square root of the right side: 0.671542649

Break this problem into two subproblems by setting 
(x + -0.5789473685) equal to 0.671542649 and -0.671542649.

Subproblem 1

x + -0.5789473685 = 0.671542649 Simplifying x + -0.5789473685 = 0.671542649 Reorder the terms: -0.5789473685 + x = 0.671542649 Solving -0.5789473685 + x = 0.671542649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5789473685' to each side of the equation. -0.5789473685 + 0.5789473685 + x = 0.671542649 + 0.5789473685 Combine like terms: -0.5789473685 + 0.5789473685 = 0.0000000000 0.0000000000 + x = 0.671542649 + 0.5789473685 x = 0.671542649 + 0.5789473685 Combine like terms: 0.671542649 + 0.5789473685 = 1.2504900175 x = 1.2504900175 Simplifying x = 1.2504900175

Subproblem 2

x + -0.5789473685 = -0.671542649 Simplifying x + -0.5789473685 = -0.671542649 Reorder the terms: -0.5789473685 + x = -0.671542649 Solving -0.5789473685 + x = -0.671542649 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5789473685' to each side of the equation. -0.5789473685 + 0.5789473685 + x = -0.671542649 + 0.5789473685 Combine like terms: -0.5789473685 + 0.5789473685 = 0.0000000000 0.0000000000 + x = -0.671542649 + 0.5789473685 x = -0.671542649 + 0.5789473685 Combine like terms: -0.671542649 + 0.5789473685 = -0.0925952805 x = -0.0925952805 Simplifying x = -0.0925952805

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2504900175, -0.0925952805}

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