(6x^2-3x+2)+(3x^2+x-5)=0

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Solution for (6x^2-3x+2)+(3x^2+x-5)=0 equation:


Simplifying
(6x2 + -3x + 2) + (3x2 + x + -5) = 0

Reorder the terms:
(2 + -3x + 6x2) + (3x2 + x + -5) = 0

Remove parenthesis around (2 + -3x + 6x2)
2 + -3x + 6x2 + (3x2 + x + -5) = 0

Reorder the terms:
2 + -3x + 6x2 + (-5 + x + 3x2) = 0

Remove parenthesis around (-5 + x + 3x2)
2 + -3x + 6x2 + -5 + x + 3x2 = 0

Reorder the terms:
2 + -5 + -3x + x + 6x2 + 3x2 = 0

Combine like terms: 2 + -5 = -3
-3 + -3x + x + 6x2 + 3x2 = 0

Combine like terms: -3x + x = -2x
-3 + -2x + 6x2 + 3x2 = 0

Combine like terms: 6x2 + 3x2 = 9x2
-3 + -2x + 9x2 = 0

Solving
-3 + -2x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-0.3333333333 + -0.2222222222x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -0.2222222222x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -0.2222222222x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -0.2222222222x + x2 = 0 + 0.3333333333
-0.2222222222x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-0.2222222222x + x2 = 0.3333333333

The x term is -0.2222222222x.  Take half its coefficient (-0.1111111111).
Square it (0.01234567901) and add it to both sides.

Add '0.01234567901' to each side of the equation.
-0.2222222222x + 0.01234567901 + x2 = 0.3333333333 + 0.01234567901

Reorder the terms:
0.01234567901 + -0.2222222222x + x2 = 0.3333333333 + 0.01234567901

Combine like terms: 0.3333333333 + 0.01234567901 = 0.34567901231
0.01234567901 + -0.2222222222x + x2 = 0.34567901231

Factor a perfect square on the left side:
(x + -0.1111111111)(x + -0.1111111111) = 0.34567901231

Calculate the square root of the right side: 0.587944736

Break this problem into two subproblems by setting 
(x + -0.1111111111) equal to 0.587944736 and -0.587944736.

Subproblem 1

x + -0.1111111111 = 0.587944736 Simplifying x + -0.1111111111 = 0.587944736 Reorder the terms: -0.1111111111 + x = 0.587944736 Solving -0.1111111111 + x = 0.587944736 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1111111111' to each side of the equation. -0.1111111111 + 0.1111111111 + x = 0.587944736 + 0.1111111111 Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000 0.0000000000 + x = 0.587944736 + 0.1111111111 x = 0.587944736 + 0.1111111111 Combine like terms: 0.587944736 + 0.1111111111 = 0.6990558471 x = 0.6990558471 Simplifying x = 0.6990558471

Subproblem 2

x + -0.1111111111 = -0.587944736 Simplifying x + -0.1111111111 = -0.587944736 Reorder the terms: -0.1111111111 + x = -0.587944736 Solving -0.1111111111 + x = -0.587944736 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1111111111' to each side of the equation. -0.1111111111 + 0.1111111111 + x = -0.587944736 + 0.1111111111 Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000 0.0000000000 + x = -0.587944736 + 0.1111111111 x = -0.587944736 + 0.1111111111 Combine like terms: -0.587944736 + 0.1111111111 = -0.4768336249 x = -0.4768336249 Simplifying x = -0.4768336249

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6990558471, -0.4768336249}

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