1.3x^2-3.306x=0.94221

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Solution for 1.3x^2-3.306x=0.94221 equation:


Simplifying
1.3x2 + -3.306x = 0.94221

Reorder the terms:
-3.306x + 1.3x2 = 0.94221

Solving
-3.306x + 1.3x2 = 0.94221

Solving for variable 'x'.

Reorder the terms:
-0.94221 + -3.306x + 1.3x2 = 0.94221 + -0.94221

Combine like terms: 0.94221 + -0.94221 = 0.00000
-0.94221 + -3.306x + 1.3x2 = 0.00000

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

Divide each side by '1.3'.
-0.7247769231 + -2.543076923x + x2 = 0.0000

Move the constant term to the right:

Add '0.7247769231' to each side of the equation.
-0.7247769231 + -2.543076923x + 0.7247769231 + x2 = 0.0000 + 0.7247769231

Reorder the terms:
-0.7247769231 + 0.7247769231 + -2.543076923x + x2 = 0.0000 + 0.7247769231

Combine like terms: -0.7247769231 + 0.7247769231 = 0.0000000000
0.0000000000 + -2.543076923x + x2 = 0.0000 + 0.7247769231
-2.543076923x + x2 = 0.0000 + 0.7247769231

Combine like terms: 0.0000 + 0.7247769231 = 0.7247769231
-2.543076923x + x2 = 0.7247769231

The x term is -2.543076923x.  Take half its coefficient (-1.271538462).
Square it (1.616810060) and add it to both sides.

Add '1.616810060' to each side of the equation.
-2.543076923x + 1.616810060 + x2 = 0.7247769231 + 1.616810060

Reorder the terms:
1.616810060 + -2.543076923x + x2 = 0.7247769231 + 1.616810060

Combine like terms: 0.7247769231 + 1.616810060 = 2.3415869831
1.616810060 + -2.543076923x + x2 = 2.3415869831

Factor a perfect square on the left side:
(x + -1.271538462)(x + -1.271538462) = 2.3415869831

Calculate the square root of the right side: 1.530224488

Break this problem into two subproblems by setting 
(x + -1.271538462) equal to 1.530224488 and -1.530224488.

Subproblem 1

x + -1.271538462 = 1.530224488 Simplifying x + -1.271538462 = 1.530224488 Reorder the terms: -1.271538462 + x = 1.530224488 Solving -1.271538462 + x = 1.530224488 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.271538462' to each side of the equation. -1.271538462 + 1.271538462 + x = 1.530224488 + 1.271538462 Combine like terms: -1.271538462 + 1.271538462 = 0.000000000 0.000000000 + x = 1.530224488 + 1.271538462 x = 1.530224488 + 1.271538462 Combine like terms: 1.530224488 + 1.271538462 = 2.80176295 x = 2.80176295 Simplifying x = 2.80176295

Subproblem 2

x + -1.271538462 = -1.530224488 Simplifying x + -1.271538462 = -1.530224488 Reorder the terms: -1.271538462 + x = -1.530224488 Solving -1.271538462 + x = -1.530224488 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.271538462' to each side of the equation. -1.271538462 + 1.271538462 + x = -1.530224488 + 1.271538462 Combine like terms: -1.271538462 + 1.271538462 = 0.000000000 0.000000000 + x = -1.530224488 + 1.271538462 x = -1.530224488 + 1.271538462 Combine like terms: -1.530224488 + 1.271538462 = -0.258686026 x = -0.258686026 Simplifying x = -0.258686026

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.80176295, -0.258686026}

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