(2x^2-5x+7)+(x^2-4x-3)=

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Solution for (2x^2-5x+7)+(x^2-4x-3)= equation:


Simplifying
(2x2 + -5x + 7) + (x2 + -4x + -3) = 0

Reorder the terms:
(7 + -5x + 2x2) + (x2 + -4x + -3) = 0

Remove parenthesis around (7 + -5x + 2x2)
7 + -5x + 2x2 + (x2 + -4x + -3) = 0

Reorder the terms:
7 + -5x + 2x2 + (-3 + -4x + x2) = 0

Remove parenthesis around (-3 + -4x + x2)
7 + -5x + 2x2 + -3 + -4x + x2 = 0

Reorder the terms:
7 + -3 + -5x + -4x + 2x2 + x2 = 0

Combine like terms: 7 + -3 = 4
4 + -5x + -4x + 2x2 + x2 = 0

Combine like terms: -5x + -4x = -9x
4 + -9x + 2x2 + x2 = 0

Combine like terms: 2x2 + x2 = 3x2
4 + -9x + 3x2 = 0

Solving
4 + -9x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
1.333333333 + -3x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -3x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -3x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -3x + x2 = 0 + -1.333333333
-3x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-3x + x2 = -1.333333333

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -1.333333333 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -1.333333333 + 2.25

Combine like terms: -1.333333333 + 2.25 = 0.916666667
2.25 + -3x + x2 = 0.916666667

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 0.916666667

Calculate the square root of the right side: 0.957427108

Break this problem into two subproblems by setting 
(x + -1.5) equal to 0.957427108 and -0.957427108.

Subproblem 1

x + -1.5 = 0.957427108 Simplifying x + -1.5 = 0.957427108 Reorder the terms: -1.5 + x = 0.957427108 Solving -1.5 + x = 0.957427108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 0.957427108 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 0.957427108 + 1.5 x = 0.957427108 + 1.5 Combine like terms: 0.957427108 + 1.5 = 2.457427108 x = 2.457427108 Simplifying x = 2.457427108

Subproblem 2

x + -1.5 = -0.957427108 Simplifying x + -1.5 = -0.957427108 Reorder the terms: -1.5 + x = -0.957427108 Solving -1.5 + x = -0.957427108 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -0.957427108 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -0.957427108 + 1.5 x = -0.957427108 + 1.5 Combine like terms: -0.957427108 + 1.5 = 0.542572892 x = 0.542572892 Simplifying x = 0.542572892

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.457427108, 0.542572892}

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