0.55x^2-1.066x=1.5

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Solution for 0.55x^2-1.066x=1.5 equation:


Simplifying
0.55x2 + -1.066x = 1.5

Reorder the terms:
-1.066x + 0.55x2 = 1.5

Solving
-1.066x + 0.55x2 = 1.5

Solving for variable 'x'.

Reorder the terms:
-1.5 + -1.066x + 0.55x2 = 1.5 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
-1.5 + -1.066x + 0.55x2 = 0.0

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

Divide each side by '0.55'.
-2.727272727 + -1.938181818x + x2 = 0

Move the constant term to the right:

Add '2.727272727' to each side of the equation.
-2.727272727 + -1.938181818x + 2.727272727 + x2 = 0 + 2.727272727

Reorder the terms:
-2.727272727 + 2.727272727 + -1.938181818x + x2 = 0 + 2.727272727

Combine like terms: -2.727272727 + 2.727272727 = 0.000000000
0.000000000 + -1.938181818x + x2 = 0 + 2.727272727
-1.938181818x + x2 = 0 + 2.727272727

Combine like terms: 0 + 2.727272727 = 2.727272727
-1.938181818x + x2 = 2.727272727

The x term is -1.938181818x.  Take half its coefficient (-0.969090909).
Square it (0.9391371899) and add it to both sides.

Add '0.9391371899' to each side of the equation.
-1.938181818x + 0.9391371899 + x2 = 2.727272727 + 0.9391371899

Reorder the terms:
0.9391371899 + -1.938181818x + x2 = 2.727272727 + 0.9391371899

Combine like terms: 2.727272727 + 0.9391371899 = 3.6664099169
0.9391371899 + -1.938181818x + x2 = 3.6664099169

Factor a perfect square on the left side:
(x + -0.969090909)(x + -0.969090909) = 3.6664099169

Calculate the square root of the right side: 1.914787173

Break this problem into two subproblems by setting 
(x + -0.969090909) equal to 1.914787173 and -1.914787173.

Subproblem 1

x + -0.969090909 = 1.914787173 Simplifying x + -0.969090909 = 1.914787173 Reorder the terms: -0.969090909 + x = 1.914787173 Solving -0.969090909 + x = 1.914787173 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.969090909' to each side of the equation. -0.969090909 + 0.969090909 + x = 1.914787173 + 0.969090909 Combine like terms: -0.969090909 + 0.969090909 = 0.000000000 0.000000000 + x = 1.914787173 + 0.969090909 x = 1.914787173 + 0.969090909 Combine like terms: 1.914787173 + 0.969090909 = 2.883878082 x = 2.883878082 Simplifying x = 2.883878082

Subproblem 2

x + -0.969090909 = -1.914787173 Simplifying x + -0.969090909 = -1.914787173 Reorder the terms: -0.969090909 + x = -1.914787173 Solving -0.969090909 + x = -1.914787173 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.969090909' to each side of the equation. -0.969090909 + 0.969090909 + x = -1.914787173 + 0.969090909 Combine like terms: -0.969090909 + 0.969090909 = 0.000000000 0.000000000 + x = -1.914787173 + 0.969090909 x = -1.914787173 + 0.969090909 Combine like terms: -1.914787173 + 0.969090909 = -0.945696264 x = -0.945696264 Simplifying x = -0.945696264

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.883878082, -0.945696264}

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