4x^2+3x^2=6-2x

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Solution for 4x^2+3x^2=6-2x equation:


Simplifying
4x2 + 3x2 = 6 + -2x

Combine like terms: 4x2 + 3x2 = 7x2
7x2 = 6 + -2x

Solving
7x2 = 6 + -2x

Solving for variable 'x'.

Reorder the terms:
-6 + 2x + 7x2 = 6 + -2x + -6 + 2x

Reorder the terms:
-6 + 2x + 7x2 = 6 + -6 + -2x + 2x

Combine like terms: 6 + -6 = 0
-6 + 2x + 7x2 = 0 + -2x + 2x
-6 + 2x + 7x2 = -2x + 2x

Combine like terms: -2x + 2x = 0
-6 + 2x + 7x2 = 0

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

Divide each side by '7'.
-0.8571428571 + 0.2857142857x + x2 = 0

Move the constant term to the right:

Add '0.8571428571' to each side of the equation.
-0.8571428571 + 0.2857142857x + 0.8571428571 + x2 = 0 + 0.8571428571

Reorder the terms:
-0.8571428571 + 0.8571428571 + 0.2857142857x + x2 = 0 + 0.8571428571

Combine like terms: -0.8571428571 + 0.8571428571 = 0.0000000000
0.0000000000 + 0.2857142857x + x2 = 0 + 0.8571428571
0.2857142857x + x2 = 0 + 0.8571428571

Combine like terms: 0 + 0.8571428571 = 0.8571428571
0.2857142857x + x2 = 0.8571428571

The x term is 0.2857142857x.  Take half its coefficient (0.1428571429).
Square it (0.02040816328) and add it to both sides.

Add '0.02040816328' to each side of the equation.
0.2857142857x + 0.02040816328 + x2 = 0.8571428571 + 0.02040816328

Reorder the terms:
0.02040816328 + 0.2857142857x + x2 = 0.8571428571 + 0.02040816328

Combine like terms: 0.8571428571 + 0.02040816328 = 0.87755102038
0.02040816328 + 0.2857142857x + x2 = 0.87755102038

Factor a perfect square on the left side:
(x + 0.1428571429)(x + 0.1428571429) = 0.87755102038

Calculate the square root of the right side: 0.936776932

Break this problem into two subproblems by setting 
(x + 0.1428571429) equal to 0.936776932 and -0.936776932.

Subproblem 1

x + 0.1428571429 = 0.936776932 Simplifying x + 0.1428571429 = 0.936776932 Reorder the terms: 0.1428571429 + x = 0.936776932 Solving 0.1428571429 + x = 0.936776932 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + x = 0.936776932 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + x = 0.936776932 + -0.1428571429 x = 0.936776932 + -0.1428571429 Combine like terms: 0.936776932 + -0.1428571429 = 0.7939197891 x = 0.7939197891 Simplifying x = 0.7939197891

Subproblem 2

x + 0.1428571429 = -0.936776932 Simplifying x + 0.1428571429 = -0.936776932 Reorder the terms: 0.1428571429 + x = -0.936776932 Solving 0.1428571429 + x = -0.936776932 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + x = -0.936776932 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + x = -0.936776932 + -0.1428571429 x = -0.936776932 + -0.1428571429 Combine like terms: -0.936776932 + -0.1428571429 = -1.0796340749 x = -1.0796340749 Simplifying x = -1.0796340749

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.7939197891, -1.0796340749}

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