(2x^2-5x+4)+(3x^2-8x)=

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Solution for (2x^2-5x+4)+(3x^2-8x)= equation:


Simplifying
(2x2 + -5x + 4) + (3x2 + -8x) = 0

Reorder the terms:
(4 + -5x + 2x2) + (3x2 + -8x) = 0

Remove parenthesis around (4 + -5x + 2x2)
4 + -5x + 2x2 + (3x2 + -8x) = 0

Reorder the terms:
4 + -5x + 2x2 + (-8x + 3x2) = 0

Remove parenthesis around (-8x + 3x2)
4 + -5x + 2x2 + -8x + 3x2 = 0

Reorder the terms:
4 + -5x + -8x + 2x2 + 3x2 = 0

Combine like terms: -5x + -8x = -13x
4 + -13x + 2x2 + 3x2 = 0

Combine like terms: 2x2 + 3x2 = 5x2
4 + -13x + 5x2 = 0

Solving
4 + -13x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
0.8 + -2.6x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + -2.6x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + -2.6x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -2.6x + x2 = 0 + -0.8
-2.6x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
-2.6x + x2 = -0.8

The x term is -2.6x.  Take half its coefficient (-1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
-2.6x + 1.69 + x2 = -0.8 + 1.69

Reorder the terms:
1.69 + -2.6x + x2 = -0.8 + 1.69

Combine like terms: -0.8 + 1.69 = 0.89
1.69 + -2.6x + x2 = 0.89

Factor a perfect square on the left side:
(x + -1.3)(x + -1.3) = 0.89

Calculate the square root of the right side: 0.943398113

Break this problem into two subproblems by setting 
(x + -1.3) equal to 0.943398113 and -0.943398113.

Subproblem 1

x + -1.3 = 0.943398113 Simplifying x + -1.3 = 0.943398113 Reorder the terms: -1.3 + x = 0.943398113 Solving -1.3 + x = 0.943398113 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + x = 0.943398113 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + x = 0.943398113 + 1.3 x = 0.943398113 + 1.3 Combine like terms: 0.943398113 + 1.3 = 2.243398113 x = 2.243398113 Simplifying x = 2.243398113

Subproblem 2

x + -1.3 = -0.943398113 Simplifying x + -1.3 = -0.943398113 Reorder the terms: -1.3 + x = -0.943398113 Solving -1.3 + x = -0.943398113 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + x = -0.943398113 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + x = -0.943398113 + 1.3 x = -0.943398113 + 1.3 Combine like terms: -0.943398113 + 1.3 = 0.356601887 x = 0.356601887 Simplifying x = 0.356601887

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.243398113, 0.356601887}

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