3x^2-2x+15x-10=x^2-3x-3x+9

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Solution for 3x^2-2x+15x-10=x^2-3x-3x+9 equation:


Simplifying
3x2 + -2x + 15x + -10 = x2 + -3x + -3x + 9

Reorder the terms:
-10 + -2x + 15x + 3x2 = x2 + -3x + -3x + 9

Combine like terms: -2x + 15x = 13x
-10 + 13x + 3x2 = x2 + -3x + -3x + 9

Reorder the terms:
-10 + 13x + 3x2 = 9 + -3x + -3x + x2

Combine like terms: -3x + -3x = -6x
-10 + 13x + 3x2 = 9 + -6x + x2

Solving
-10 + 13x + 3x2 = 9 + -6x + x2

Solving for variable 'x'.

Reorder the terms:
-10 + -9 + 13x + 6x + 3x2 + -1x2 = 9 + -6x + x2 + -9 + 6x + -1x2

Combine like terms: -10 + -9 = -19
-19 + 13x + 6x + 3x2 + -1x2 = 9 + -6x + x2 + -9 + 6x + -1x2

Combine like terms: 13x + 6x = 19x
-19 + 19x + 3x2 + -1x2 = 9 + -6x + x2 + -9 + 6x + -1x2

Combine like terms: 3x2 + -1x2 = 2x2
-19 + 19x + 2x2 = 9 + -6x + x2 + -9 + 6x + -1x2

Reorder the terms:
-19 + 19x + 2x2 = 9 + -9 + -6x + 6x + x2 + -1x2

Combine like terms: 9 + -9 = 0
-19 + 19x + 2x2 = 0 + -6x + 6x + x2 + -1x2
-19 + 19x + 2x2 = -6x + 6x + x2 + -1x2

Combine like terms: -6x + 6x = 0
-19 + 19x + 2x2 = 0 + x2 + -1x2
-19 + 19x + 2x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-19 + 19x + 2x2 = 0

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

Divide each side by '2'.
-9.5 + 9.5x + x2 = 0

Move the constant term to the right:

Add '9.5' to each side of the equation.
-9.5 + 9.5x + 9.5 + x2 = 0 + 9.5

Reorder the terms:
-9.5 + 9.5 + 9.5x + x2 = 0 + 9.5

Combine like terms: -9.5 + 9.5 = 0.0
0.0 + 9.5x + x2 = 0 + 9.5
9.5x + x2 = 0 + 9.5

Combine like terms: 0 + 9.5 = 9.5
9.5x + x2 = 9.5

The x term is 9.5x.  Take half its coefficient (4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
9.5x + 22.5625 + x2 = 9.5 + 22.5625

Reorder the terms:
22.5625 + 9.5x + x2 = 9.5 + 22.5625

Combine like terms: 9.5 + 22.5625 = 32.0625
22.5625 + 9.5x + x2 = 32.0625

Factor a perfect square on the left side:
(x + 4.75)(x + 4.75) = 32.0625

Calculate the square root of the right side: 5.662375826

Break this problem into two subproblems by setting 
(x + 4.75) equal to 5.662375826 and -5.662375826.

Subproblem 1

x + 4.75 = 5.662375826 Simplifying x + 4.75 = 5.662375826 Reorder the terms: 4.75 + x = 5.662375826 Solving 4.75 + x = 5.662375826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = 5.662375826 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = 5.662375826 + -4.75 x = 5.662375826 + -4.75 Combine like terms: 5.662375826 + -4.75 = 0.912375826 x = 0.912375826 Simplifying x = 0.912375826

Subproblem 2

x + 4.75 = -5.662375826 Simplifying x + 4.75 = -5.662375826 Reorder the terms: 4.75 + x = -5.662375826 Solving 4.75 + x = -5.662375826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.75' to each side of the equation. 4.75 + -4.75 + x = -5.662375826 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + x = -5.662375826 + -4.75 x = -5.662375826 + -4.75 Combine like terms: -5.662375826 + -4.75 = -10.412375826 x = -10.412375826 Simplifying x = -10.412375826

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.912375826, -10.412375826}

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