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

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


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

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

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

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

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

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

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

Combine like terms: -5x + -2x = -7x
-2 + -7x + 2x2 + 5x2 = 0

Combine like terms: 2x2 + 5x2 = 7x2
-2 + -7x + 7x2 = 0

Solving
-2 + -7x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-0.2857142857 + -1x + x2 = 0

Move the constant term to the right:

Add '0.2857142857' to each side of the equation.
-0.2857142857 + -1x + 0.2857142857 + x2 = 0 + 0.2857142857

Reorder the terms:
-0.2857142857 + 0.2857142857 + -1x + x2 = 0 + 0.2857142857

Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000
0.0000000000 + -1x + x2 = 0 + 0.2857142857
-1x + x2 = 0 + 0.2857142857

Combine like terms: 0 + 0.2857142857 = 0.2857142857
-1x + x2 = 0.2857142857

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 0.2857142857 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 0.2857142857 + 0.25

Combine like terms: 0.2857142857 + 0.25 = 0.5357142857
0.25 + -1x + x2 = 0.5357142857

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 0.5357142857

Calculate the square root of the right side: 0.731925055

Break this problem into two subproblems by setting 
(x + -0.5) equal to 0.731925055 and -0.731925055.

Subproblem 1

x + -0.5 = 0.731925055 Simplifying x + -0.5 = 0.731925055 Reorder the terms: -0.5 + x = 0.731925055 Solving -0.5 + x = 0.731925055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.731925055 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.731925055 + 0.5 x = 0.731925055 + 0.5 Combine like terms: 0.731925055 + 0.5 = 1.231925055 x = 1.231925055 Simplifying x = 1.231925055

Subproblem 2

x + -0.5 = -0.731925055 Simplifying x + -0.5 = -0.731925055 Reorder the terms: -0.5 + x = -0.731925055 Solving -0.5 + x = -0.731925055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -0.731925055 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.731925055 + 0.5 x = -0.731925055 + 0.5 Combine like terms: -0.731925055 + 0.5 = -0.231925055 x = -0.231925055 Simplifying x = -0.231925055

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.231925055, -0.231925055}

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