(x-7)(3x-5)=3

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Solution for (x-7)(3x-5)=3 equation:


Simplifying
(x + -7)(3x + -5) = 3

Reorder the terms:
(-7 + x)(3x + -5) = 3

Reorder the terms:
(-7 + x)(-5 + 3x) = 3

Multiply (-7 + x) * (-5 + 3x)
(-7(-5 + 3x) + x(-5 + 3x)) = 3
((-5 * -7 + 3x * -7) + x(-5 + 3x)) = 3
((35 + -21x) + x(-5 + 3x)) = 3
(35 + -21x + (-5 * x + 3x * x)) = 3
(35 + -21x + (-5x + 3x2)) = 3

Combine like terms: -21x + -5x = -26x
(35 + -26x + 3x2) = 3

Solving
35 + -26x + 3x2 = 3

Solving for variable 'x'.

Reorder the terms:
35 + -3 + -26x + 3x2 = 3 + -3

Combine like terms: 35 + -3 = 32
32 + -26x + 3x2 = 3 + -3

Combine like terms: 3 + -3 = 0
32 + -26x + 3x2 = 0

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

Divide each side by '3'.
10.66666667 + -8.666666667x + x2 = 0

Move the constant term to the right:

Add '-10.66666667' to each side of the equation.
10.66666667 + -8.666666667x + -10.66666667 + x2 = 0 + -10.66666667

Reorder the terms:
10.66666667 + -10.66666667 + -8.666666667x + x2 = 0 + -10.66666667

Combine like terms: 10.66666667 + -10.66666667 = 0.00000000
0.00000000 + -8.666666667x + x2 = 0 + -10.66666667
-8.666666667x + x2 = 0 + -10.66666667

Combine like terms: 0 + -10.66666667 = -10.66666667
-8.666666667x + x2 = -10.66666667

The x term is -8.666666667x.  Take half its coefficient (-4.333333334).
Square it (18.77777778) and add it to both sides.

Add '18.77777778' to each side of the equation.
-8.666666667x + 18.77777778 + x2 = -10.66666667 + 18.77777778

Reorder the terms:
18.77777778 + -8.666666667x + x2 = -10.66666667 + 18.77777778

Combine like terms: -10.66666667 + 18.77777778 = 8.11111111
18.77777778 + -8.666666667x + x2 = 8.11111111

Factor a perfect square on the left side:
(x + -4.333333334)(x + -4.333333334) = 8.11111111

Calculate the square root of the right side: 2.848001248

Break this problem into two subproblems by setting 
(x + -4.333333334) equal to 2.848001248 and -2.848001248.

Subproblem 1

x + -4.333333334 = 2.848001248 Simplifying x + -4.333333334 = 2.848001248 Reorder the terms: -4.333333334 + x = 2.848001248 Solving -4.333333334 + x = 2.848001248 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.333333334' to each side of the equation. -4.333333334 + 4.333333334 + x = 2.848001248 + 4.333333334 Combine like terms: -4.333333334 + 4.333333334 = 0.000000000 0.000000000 + x = 2.848001248 + 4.333333334 x = 2.848001248 + 4.333333334 Combine like terms: 2.848001248 + 4.333333334 = 7.181334582 x = 7.181334582 Simplifying x = 7.181334582

Subproblem 2

x + -4.333333334 = -2.848001248 Simplifying x + -4.333333334 = -2.848001248 Reorder the terms: -4.333333334 + x = -2.848001248 Solving -4.333333334 + x = -2.848001248 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.333333334' to each side of the equation. -4.333333334 + 4.333333334 + x = -2.848001248 + 4.333333334 Combine like terms: -4.333333334 + 4.333333334 = 0.000000000 0.000000000 + x = -2.848001248 + 4.333333334 x = -2.848001248 + 4.333333334 Combine like terms: -2.848001248 + 4.333333334 = 1.485332086 x = 1.485332086 Simplifying x = 1.485332086

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.181334582, 1.485332086}

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