(3x-5)+(1x-7)(7x+12)=

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Solution for (3x-5)+(1x-7)(7x+12)= equation:


Simplifying
(3x + -5) + (1x + -7)(7x + 12) = 0

Reorder the terms:
(-5 + 3x) + (1x + -7)(7x + 12) = 0

Remove parenthesis around (-5 + 3x)
-5 + 3x + (1x + -7)(7x + 12) = 0

Reorder the terms:
-5 + 3x + (-7 + 1x)(7x + 12) = 0

Reorder the terms:
-5 + 3x + (-7 + 1x)(12 + 7x) = 0

Multiply (-7 + 1x) * (12 + 7x)
-5 + 3x + (-7(12 + 7x) + 1x * (12 + 7x)) = 0
-5 + 3x + ((12 * -7 + 7x * -7) + 1x * (12 + 7x)) = 0
-5 + 3x + ((-84 + -49x) + 1x * (12 + 7x)) = 0
-5 + 3x + (-84 + -49x + (12 * 1x + 7x * 1x)) = 0
-5 + 3x + (-84 + -49x + (12x + 7x2)) = 0

Combine like terms: -49x + 12x = -37x
-5 + 3x + (-84 + -37x + 7x2) = 0

Reorder the terms:
-5 + -84 + 3x + -37x + 7x2 = 0

Combine like terms: -5 + -84 = -89
-89 + 3x + -37x + 7x2 = 0

Combine like terms: 3x + -37x = -34x
-89 + -34x + 7x2 = 0

Solving
-89 + -34x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-12.71428571 + -4.857142857x + x2 = 0

Move the constant term to the right:

Add '12.71428571' to each side of the equation.
-12.71428571 + -4.857142857x + 12.71428571 + x2 = 0 + 12.71428571

Reorder the terms:
-12.71428571 + 12.71428571 + -4.857142857x + x2 = 0 + 12.71428571

Combine like terms: -12.71428571 + 12.71428571 = 0.00000000
0.00000000 + -4.857142857x + x2 = 0 + 12.71428571
-4.857142857x + x2 = 0 + 12.71428571

Combine like terms: 0 + 12.71428571 = 12.71428571
-4.857142857x + x2 = 12.71428571

The x term is -4.857142857x.  Take half its coefficient (-2.428571429).
Square it (5.897959186) and add it to both sides.

Add '5.897959186' to each side of the equation.
-4.857142857x + 5.897959186 + x2 = 12.71428571 + 5.897959186

Reorder the terms:
5.897959186 + -4.857142857x + x2 = 12.71428571 + 5.897959186

Combine like terms: 12.71428571 + 5.897959186 = 18.612244896
5.897959186 + -4.857142857x + x2 = 18.612244896

Factor a perfect square on the left side:
(x + -2.428571429)(x + -2.428571429) = 18.612244896

Calculate the square root of the right side: 4.314191106

Break this problem into two subproblems by setting 
(x + -2.428571429) equal to 4.314191106 and -4.314191106.

Subproblem 1

x + -2.428571429 = 4.314191106 Simplifying x + -2.428571429 = 4.314191106 Reorder the terms: -2.428571429 + x = 4.314191106 Solving -2.428571429 + x = 4.314191106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.428571429' to each side of the equation. -2.428571429 + 2.428571429 + x = 4.314191106 + 2.428571429 Combine like terms: -2.428571429 + 2.428571429 = 0.000000000 0.000000000 + x = 4.314191106 + 2.428571429 x = 4.314191106 + 2.428571429 Combine like terms: 4.314191106 + 2.428571429 = 6.742762535 x = 6.742762535 Simplifying x = 6.742762535

Subproblem 2

x + -2.428571429 = -4.314191106 Simplifying x + -2.428571429 = -4.314191106 Reorder the terms: -2.428571429 + x = -4.314191106 Solving -2.428571429 + x = -4.314191106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.428571429' to each side of the equation. -2.428571429 + 2.428571429 + x = -4.314191106 + 2.428571429 Combine like terms: -2.428571429 + 2.428571429 = 0.000000000 0.000000000 + x = -4.314191106 + 2.428571429 x = -4.314191106 + 2.428571429 Combine like terms: -4.314191106 + 2.428571429 = -1.885619677 x = -1.885619677 Simplifying x = -1.885619677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.742762535, -1.885619677}

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