(3x-1)*(2x+7)=62

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Solution for (3x-1)*(2x+7)=62 equation:


Simplifying
(3x + -1)(2x + 7) = 62

Reorder the terms:
(-1 + 3x)(2x + 7) = 62

Reorder the terms:
(-1 + 3x)(7 + 2x) = 62

Multiply (-1 + 3x) * (7 + 2x)
(-1(7 + 2x) + 3x * (7 + 2x)) = 62
((7 * -1 + 2x * -1) + 3x * (7 + 2x)) = 62
((-7 + -2x) + 3x * (7 + 2x)) = 62
(-7 + -2x + (7 * 3x + 2x * 3x)) = 62
(-7 + -2x + (21x + 6x2)) = 62

Combine like terms: -2x + 21x = 19x
(-7 + 19x + 6x2) = 62

Solving
-7 + 19x + 6x2 = 62

Solving for variable 'x'.

Reorder the terms:
-7 + -62 + 19x + 6x2 = 62 + -62

Combine like terms: -7 + -62 = -69
-69 + 19x + 6x2 = 62 + -62

Combine like terms: 62 + -62 = 0
-69 + 19x + 6x2 = 0

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

Divide each side by '6'.
-11.5 + 3.166666667x + x2 = 0

Move the constant term to the right:

Add '11.5' to each side of the equation.
-11.5 + 3.166666667x + 11.5 + x2 = 0 + 11.5

Reorder the terms:
-11.5 + 11.5 + 3.166666667x + x2 = 0 + 11.5

Combine like terms: -11.5 + 11.5 = 0.0
0.0 + 3.166666667x + x2 = 0 + 11.5
3.166666667x + x2 = 0 + 11.5

Combine like terms: 0 + 11.5 = 11.5
3.166666667x + x2 = 11.5

The x term is 3.166666667x.  Take half its coefficient (1.583333334).
Square it (2.506944447) and add it to both sides.

Add '2.506944447' to each side of the equation.
3.166666667x + 2.506944447 + x2 = 11.5 + 2.506944447

Reorder the terms:
2.506944447 + 3.166666667x + x2 = 11.5 + 2.506944447

Combine like terms: 11.5 + 2.506944447 = 14.006944447
2.506944447 + 3.166666667x + x2 = 14.006944447

Factor a perfect square on the left side:
(x + 1.583333334)(x + 1.583333334) = 14.006944447

Calculate the square root of the right side: 3.742585262

Break this problem into two subproblems by setting 
(x + 1.583333334) equal to 3.742585262 and -3.742585262.

Subproblem 1

x + 1.583333334 = 3.742585262 Simplifying x + 1.583333334 = 3.742585262 Reorder the terms: 1.583333334 + x = 3.742585262 Solving 1.583333334 + x = 3.742585262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.583333334' to each side of the equation. 1.583333334 + -1.583333334 + x = 3.742585262 + -1.583333334 Combine like terms: 1.583333334 + -1.583333334 = 0.000000000 0.000000000 + x = 3.742585262 + -1.583333334 x = 3.742585262 + -1.583333334 Combine like terms: 3.742585262 + -1.583333334 = 2.159251928 x = 2.159251928 Simplifying x = 2.159251928

Subproblem 2

x + 1.583333334 = -3.742585262 Simplifying x + 1.583333334 = -3.742585262 Reorder the terms: 1.583333334 + x = -3.742585262 Solving 1.583333334 + x = -3.742585262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.583333334' to each side of the equation. 1.583333334 + -1.583333334 + x = -3.742585262 + -1.583333334 Combine like terms: 1.583333334 + -1.583333334 = 0.000000000 0.000000000 + x = -3.742585262 + -1.583333334 x = -3.742585262 + -1.583333334 Combine like terms: -3.742585262 + -1.583333334 = -5.325918596 x = -5.325918596 Simplifying x = -5.325918596

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.159251928, -5.325918596}

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