7(3.4225-3.7x+x^2)=x^2

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Solution for 7(3.4225-3.7x+x^2)=x^2 equation:


Simplifying
7(3.4225 + -3.7x + x2) = x2
(3.4225 * 7 + -3.7x * 7 + x2 * 7) = x2
(23.9575 + -25.9x + 7x2) = x2

Solving
23.9575 + -25.9x + 7x2 = x2

Solving for variable 'x'.

Combine like terms: 7x2 + -1x2 = 6x2
23.9575 + -25.9x + 6x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
23.9575 + -25.9x + 6x2 = 0

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

Divide each side by '6'.
3.992916667 + -4.316666667x + x2 = 0

Move the constant term to the right:

Add '-3.992916667' to each side of the equation.
3.992916667 + -4.316666667x + -3.992916667 + x2 = 0 + -3.992916667

Reorder the terms:
3.992916667 + -3.992916667 + -4.316666667x + x2 = 0 + -3.992916667

Combine like terms: 3.992916667 + -3.992916667 = 0.000000000
0.000000000 + -4.316666667x + x2 = 0 + -3.992916667
-4.316666667x + x2 = 0 + -3.992916667

Combine like terms: 0 + -3.992916667 = -3.992916667
-4.316666667x + x2 = -3.992916667

The x term is -4.316666667x.  Take half its coefficient (-2.158333334).
Square it (4.658402781) and add it to both sides.

Add '4.658402781' to each side of the equation.
-4.316666667x + 4.658402781 + x2 = -3.992916667 + 4.658402781

Reorder the terms:
4.658402781 + -4.316666667x + x2 = -3.992916667 + 4.658402781

Combine like terms: -3.992916667 + 4.658402781 = 0.665486114
4.658402781 + -4.316666667x + x2 = 0.665486114

Factor a perfect square on the left side:
(x + -2.158333334)(x + -2.158333334) = 0.665486114

Calculate the square root of the right side: 0.815773323

Break this problem into two subproblems by setting 
(x + -2.158333334) equal to 0.815773323 and -0.815773323.

Subproblem 1

x + -2.158333334 = 0.815773323 Simplifying x + -2.158333334 = 0.815773323 Reorder the terms: -2.158333334 + x = 0.815773323 Solving -2.158333334 + x = 0.815773323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.158333334' to each side of the equation. -2.158333334 + 2.158333334 + x = 0.815773323 + 2.158333334 Combine like terms: -2.158333334 + 2.158333334 = 0.000000000 0.000000000 + x = 0.815773323 + 2.158333334 x = 0.815773323 + 2.158333334 Combine like terms: 0.815773323 + 2.158333334 = 2.974106657 x = 2.974106657 Simplifying x = 2.974106657

Subproblem 2

x + -2.158333334 = -0.815773323 Simplifying x + -2.158333334 = -0.815773323 Reorder the terms: -2.158333334 + x = -0.815773323 Solving -2.158333334 + x = -0.815773323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.158333334' to each side of the equation. -2.158333334 + 2.158333334 + x = -0.815773323 + 2.158333334 Combine like terms: -2.158333334 + 2.158333334 = 0.000000000 0.000000000 + x = -0.815773323 + 2.158333334 x = -0.815773323 + 2.158333334 Combine like terms: -0.815773323 + 2.158333334 = 1.342560011 x = 1.342560011 Simplifying x = 1.342560011

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.974106657, 1.342560011}

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