(3x-1)(x-3)+4x-19=0

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Solution for (3x-1)(x-3)+4x-19=0 equation:


Simplifying
(3x + -1)(x + -3) + 4x + -19 = 0

Reorder the terms:
(-1 + 3x)(x + -3) + 4x + -19 = 0

Reorder the terms:
(-1 + 3x)(-3 + x) + 4x + -19 = 0

Multiply (-1 + 3x) * (-3 + x)
(-1(-3 + x) + 3x * (-3 + x)) + 4x + -19 = 0
((-3 * -1 + x * -1) + 3x * (-3 + x)) + 4x + -19 = 0
((3 + -1x) + 3x * (-3 + x)) + 4x + -19 = 0
(3 + -1x + (-3 * 3x + x * 3x)) + 4x + -19 = 0
(3 + -1x + (-9x + 3x2)) + 4x + -19 = 0

Combine like terms: -1x + -9x = -10x
(3 + -10x + 3x2) + 4x + -19 = 0

Reorder the terms:
3 + -19 + -10x + 4x + 3x2 = 0

Combine like terms: 3 + -19 = -16
-16 + -10x + 4x + 3x2 = 0

Combine like terms: -10x + 4x = -6x
-16 + -6x + 3x2 = 0

Solving
-16 + -6x + 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'.
-5.333333333 + -2x + x2 = 0

Move the constant term to the right:

Add '5.333333333' to each side of the equation.
-5.333333333 + -2x + 5.333333333 + x2 = 0 + 5.333333333

Reorder the terms:
-5.333333333 + 5.333333333 + -2x + x2 = 0 + 5.333333333

Combine like terms: -5.333333333 + 5.333333333 = 0.000000000
0.000000000 + -2x + x2 = 0 + 5.333333333
-2x + x2 = 0 + 5.333333333

Combine like terms: 0 + 5.333333333 = 5.333333333
-2x + x2 = 5.333333333

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 5.333333333 + 1

Reorder the terms:
1 + -2x + x2 = 5.333333333 + 1

Combine like terms: 5.333333333 + 1 = 6.333333333
1 + -2x + x2 = 6.333333333

Factor a perfect square on the left side:
(x + -1)(x + -1) = 6.333333333

Calculate the square root of the right side: 2.516611478

Break this problem into two subproblems by setting 
(x + -1) equal to 2.516611478 and -2.516611478.

Subproblem 1

x + -1 = 2.516611478 Simplifying x + -1 = 2.516611478 Reorder the terms: -1 + x = 2.516611478 Solving -1 + x = 2.516611478 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 2.516611478 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.516611478 + 1 x = 2.516611478 + 1 Combine like terms: 2.516611478 + 1 = 3.516611478 x = 3.516611478 Simplifying x = 3.516611478

Subproblem 2

x + -1 = -2.516611478 Simplifying x + -1 = -2.516611478 Reorder the terms: -1 + x = -2.516611478 Solving -1 + x = -2.516611478 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -2.516611478 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.516611478 + 1 x = -2.516611478 + 1 Combine like terms: -2.516611478 + 1 = -1.516611478 x = -1.516611478 Simplifying x = -1.516611478

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.516611478, -1.516611478}

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