(9x^2+3x-2)+(3x^2-5x-3)=

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Solution for (9x^2+3x-2)+(3x^2-5x-3)= equation:


Simplifying
(9x2 + 3x + -2) + (3x2 + -5x + -3) = 0

Reorder the terms:
(-2 + 3x + 9x2) + (3x2 + -5x + -3) = 0

Remove parenthesis around (-2 + 3x + 9x2)
-2 + 3x + 9x2 + (3x2 + -5x + -3) = 0

Reorder the terms:
-2 + 3x + 9x2 + (-3 + -5x + 3x2) = 0

Remove parenthesis around (-3 + -5x + 3x2)
-2 + 3x + 9x2 + -3 + -5x + 3x2 = 0

Reorder the terms:
-2 + -3 + 3x + -5x + 9x2 + 3x2 = 0

Combine like terms: -2 + -3 = -5
-5 + 3x + -5x + 9x2 + 3x2 = 0

Combine like terms: 3x + -5x = -2x
-5 + -2x + 9x2 + 3x2 = 0

Combine like terms: 9x2 + 3x2 = 12x2
-5 + -2x + 12x2 = 0

Solving
-5 + -2x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
-0.4166666667 + -0.1666666667x + x2 = 0

Move the constant term to the right:

Add '0.4166666667' to each side of the equation.
-0.4166666667 + -0.1666666667x + 0.4166666667 + x2 = 0 + 0.4166666667

Reorder the terms:
-0.4166666667 + 0.4166666667 + -0.1666666667x + x2 = 0 + 0.4166666667

Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000
0.0000000000 + -0.1666666667x + x2 = 0 + 0.4166666667
-0.1666666667x + x2 = 0 + 0.4166666667

Combine like terms: 0 + 0.4166666667 = 0.4166666667
-0.1666666667x + x2 = 0.4166666667

The x term is -0.1666666667x.  Take half its coefficient (-0.08333333335).
Square it (0.006944444447) and add it to both sides.

Add '0.006944444447' to each side of the equation.
-0.1666666667x + 0.006944444447 + x2 = 0.4166666667 + 0.006944444447

Reorder the terms:
0.006944444447 + -0.1666666667x + x2 = 0.4166666667 + 0.006944444447

Combine like terms: 0.4166666667 + 0.006944444447 = 0.423611111147
0.006944444447 + -0.1666666667x + x2 = 0.423611111147

Factor a perfect square on the left side:
(x + -0.08333333335)(x + -0.08333333335) = 0.423611111147

Calculate the square root of the right side: 0.65085414

Break this problem into two subproblems by setting 
(x + -0.08333333335) equal to 0.65085414 and -0.65085414.

Subproblem 1

x + -0.08333333335 = 0.65085414 Simplifying x + -0.08333333335 = 0.65085414 Reorder the terms: -0.08333333335 + x = 0.65085414 Solving -0.08333333335 + x = 0.65085414 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + x = 0.65085414 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + x = 0.65085414 + 0.08333333335 x = 0.65085414 + 0.08333333335 Combine like terms: 0.65085414 + 0.08333333335 = 0.73418747335 x = 0.73418747335 Simplifying x = 0.73418747335

Subproblem 2

x + -0.08333333335 = -0.65085414 Simplifying x + -0.08333333335 = -0.65085414 Reorder the terms: -0.08333333335 + x = -0.65085414 Solving -0.08333333335 + x = -0.65085414 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.08333333335' to each side of the equation. -0.08333333335 + 0.08333333335 + x = -0.65085414 + 0.08333333335 Combine like terms: -0.08333333335 + 0.08333333335 = 0.00000000000 0.00000000000 + x = -0.65085414 + 0.08333333335 x = -0.65085414 + 0.08333333335 Combine like terms: -0.65085414 + 0.08333333335 = -0.56752080665 x = -0.56752080665 Simplifying x = -0.56752080665

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.73418747335, -0.56752080665}

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