(-5x^2+3x)-(6x^2+7x-4)=

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Solution for (-5x^2+3x)-(6x^2+7x-4)= equation:


Simplifying
(-5x2 + 3x) + -1(6x2 + 7x + -4) = 0

Reorder the terms:
(3x + -5x2) + -1(6x2 + 7x + -4) = 0

Remove parenthesis around (3x + -5x2)
3x + -5x2 + -1(6x2 + 7x + -4) = 0

Reorder the terms:
3x + -5x2 + -1(-4 + 7x + 6x2) = 0
3x + -5x2 + (-4 * -1 + 7x * -1 + 6x2 * -1) = 0
3x + -5x2 + (4 + -7x + -6x2) = 0

Reorder the terms:
4 + 3x + -7x + -5x2 + -6x2 = 0

Combine like terms: 3x + -7x = -4x
4 + -4x + -5x2 + -6x2 = 0

Combine like terms: -5x2 + -6x2 = -11x2
4 + -4x + -11x2 = 0

Solving
4 + -4x + -11x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-11 the coefficient of the squared term: 

Divide each side by '-11'.
-0.3636363636 + 0.3636363636x + x2 = 0

Move the constant term to the right:

Add '0.3636363636' to each side of the equation.
-0.3636363636 + 0.3636363636x + 0.3636363636 + x2 = 0 + 0.3636363636

Reorder the terms:
-0.3636363636 + 0.3636363636 + 0.3636363636x + x2 = 0 + 0.3636363636

Combine like terms: -0.3636363636 + 0.3636363636 = 0.0000000000
0.0000000000 + 0.3636363636x + x2 = 0 + 0.3636363636
0.3636363636x + x2 = 0 + 0.3636363636

Combine like terms: 0 + 0.3636363636 = 0.3636363636
0.3636363636x + x2 = 0.3636363636

The x term is 0.3636363636x.  Take half its coefficient (0.1818181818).
Square it (0.03305785123) and add it to both sides.

Add '0.03305785123' to each side of the equation.
0.3636363636x + 0.03305785123 + x2 = 0.3636363636 + 0.03305785123

Reorder the terms:
0.03305785123 + 0.3636363636x + x2 = 0.3636363636 + 0.03305785123

Combine like terms: 0.3636363636 + 0.03305785123 = 0.39669421483
0.03305785123 + 0.3636363636x + x2 = 0.39669421483

Factor a perfect square on the left side:
(x + 0.1818181818)(x + 0.1818181818) = 0.39669421483

Calculate the square root of the right side: 0.629836657

Break this problem into two subproblems by setting 
(x + 0.1818181818) equal to 0.629836657 and -0.629836657.

Subproblem 1

x + 0.1818181818 = 0.629836657 Simplifying x + 0.1818181818 = 0.629836657 Reorder the terms: 0.1818181818 + x = 0.629836657 Solving 0.1818181818 + x = 0.629836657 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1818181818' to each side of the equation. 0.1818181818 + -0.1818181818 + x = 0.629836657 + -0.1818181818 Combine like terms: 0.1818181818 + -0.1818181818 = 0.0000000000 0.0000000000 + x = 0.629836657 + -0.1818181818 x = 0.629836657 + -0.1818181818 Combine like terms: 0.629836657 + -0.1818181818 = 0.4480184752 x = 0.4480184752 Simplifying x = 0.4480184752

Subproblem 2

x + 0.1818181818 = -0.629836657 Simplifying x + 0.1818181818 = -0.629836657 Reorder the terms: 0.1818181818 + x = -0.629836657 Solving 0.1818181818 + x = -0.629836657 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1818181818' to each side of the equation. 0.1818181818 + -0.1818181818 + x = -0.629836657 + -0.1818181818 Combine like terms: 0.1818181818 + -0.1818181818 = 0.0000000000 0.0000000000 + x = -0.629836657 + -0.1818181818 x = -0.629836657 + -0.1818181818 Combine like terms: -0.629836657 + -0.1818181818 = -0.8116548388 x = -0.8116548388 Simplifying x = -0.8116548388

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4480184752, -0.8116548388}

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