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

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


Simplifying
3(2x2 + -3x + 5) + -5(3x2 + -4x + -6) = 0

Reorder the terms:
3(5 + -3x + 2x2) + -5(3x2 + -4x + -6) = 0
(5 * 3 + -3x * 3 + 2x2 * 3) + -5(3x2 + -4x + -6) = 0
(15 + -9x + 6x2) + -5(3x2 + -4x + -6) = 0

Reorder the terms:
15 + -9x + 6x2 + -5(-6 + -4x + 3x2) = 0
15 + -9x + 6x2 + (-6 * -5 + -4x * -5 + 3x2 * -5) = 0
15 + -9x + 6x2 + (30 + 20x + -15x2) = 0

Reorder the terms:
15 + 30 + -9x + 20x + 6x2 + -15x2 = 0

Combine like terms: 15 + 30 = 45
45 + -9x + 20x + 6x2 + -15x2 = 0

Combine like terms: -9x + 20x = 11x
45 + 11x + 6x2 + -15x2 = 0

Combine like terms: 6x2 + -15x2 = -9x2
45 + 11x + -9x2 = 0

Solving
45 + 11x + -9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-9 the coefficient of the squared term: 

Divide each side by '-9'.
-5 + -1.222222222x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -1.222222222x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -1.222222222x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1.222222222x + x2 = 0 + 5
-1.222222222x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-1.222222222x + x2 = 5

The x term is -1.222222222x.  Take half its coefficient (-0.611111111).
Square it (0.3734567900) and add it to both sides.

Add '0.3734567900' to each side of the equation.
-1.222222222x + 0.3734567900 + x2 = 5 + 0.3734567900

Reorder the terms:
0.3734567900 + -1.222222222x + x2 = 5 + 0.3734567900

Combine like terms: 5 + 0.3734567900 = 5.37345679
0.3734567900 + -1.222222222x + x2 = 5.37345679

Factor a perfect square on the left side:
(x + -0.611111111)(x + -0.611111111) = 5.37345679

Calculate the square root of the right side: 2.318071783

Break this problem into two subproblems by setting 
(x + -0.611111111) equal to 2.318071783 and -2.318071783.

Subproblem 1

x + -0.611111111 = 2.318071783 Simplifying x + -0.611111111 = 2.318071783 Reorder the terms: -0.611111111 + x = 2.318071783 Solving -0.611111111 + x = 2.318071783 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.611111111' to each side of the equation. -0.611111111 + 0.611111111 + x = 2.318071783 + 0.611111111 Combine like terms: -0.611111111 + 0.611111111 = 0.000000000 0.000000000 + x = 2.318071783 + 0.611111111 x = 2.318071783 + 0.611111111 Combine like terms: 2.318071783 + 0.611111111 = 2.929182894 x = 2.929182894 Simplifying x = 2.929182894

Subproblem 2

x + -0.611111111 = -2.318071783 Simplifying x + -0.611111111 = -2.318071783 Reorder the terms: -0.611111111 + x = -2.318071783 Solving -0.611111111 + x = -2.318071783 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.611111111' to each side of the equation. -0.611111111 + 0.611111111 + x = -2.318071783 + 0.611111111 Combine like terms: -0.611111111 + 0.611111111 = 0.000000000 0.000000000 + x = -2.318071783 + 0.611111111 x = -2.318071783 + 0.611111111 Combine like terms: -2.318071783 + 0.611111111 = -1.706960672 x = -1.706960672 Simplifying x = -1.706960672

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.929182894, -1.706960672}

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