(2x+5)(3x-1)=24

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Solution for (2x+5)(3x-1)=24 equation:


Simplifying
(2x + 5)(3x + -1) = 24

Reorder the terms:
(5 + 2x)(3x + -1) = 24

Reorder the terms:
(5 + 2x)(-1 + 3x) = 24

Multiply (5 + 2x) * (-1 + 3x)
(5(-1 + 3x) + 2x * (-1 + 3x)) = 24
((-1 * 5 + 3x * 5) + 2x * (-1 + 3x)) = 24
((-5 + 15x) + 2x * (-1 + 3x)) = 24
(-5 + 15x + (-1 * 2x + 3x * 2x)) = 24
(-5 + 15x + (-2x + 6x2)) = 24

Combine like terms: 15x + -2x = 13x
(-5 + 13x + 6x2) = 24

Solving
-5 + 13x + 6x2 = 24

Solving for variable 'x'.

Reorder the terms:
-5 + -24 + 13x + 6x2 = 24 + -24

Combine like terms: -5 + -24 = -29
-29 + 13x + 6x2 = 24 + -24

Combine like terms: 24 + -24 = 0
-29 + 13x + 6x2 = 0

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

Divide each side by '6'.
-4.833333333 + 2.166666667x + x2 = 0

Move the constant term to the right:

Add '4.833333333' to each side of the equation.
-4.833333333 + 2.166666667x + 4.833333333 + x2 = 0 + 4.833333333

Reorder the terms:
-4.833333333 + 4.833333333 + 2.166666667x + x2 = 0 + 4.833333333

Combine like terms: -4.833333333 + 4.833333333 = 0.000000000
0.000000000 + 2.166666667x + x2 = 0 + 4.833333333
2.166666667x + x2 = 0 + 4.833333333

Combine like terms: 0 + 4.833333333 = 4.833333333
2.166666667x + x2 = 4.833333333

The x term is 2.166666667x.  Take half its coefficient (1.083333334).
Square it (1.173611113) and add it to both sides.

Add '1.173611113' to each side of the equation.
2.166666667x + 1.173611113 + x2 = 4.833333333 + 1.173611113

Reorder the terms:
1.173611113 + 2.166666667x + x2 = 4.833333333 + 1.173611113

Combine like terms: 4.833333333 + 1.173611113 = 6.006944446
1.173611113 + 2.166666667x + x2 = 6.006944446

Factor a perfect square on the left side:
(x + 1.083333334)(x + 1.083333334) = 6.006944446

Calculate the square root of the right side: 2.450906862

Break this problem into two subproblems by setting 
(x + 1.083333334) equal to 2.450906862 and -2.450906862.

Subproblem 1

x + 1.083333334 = 2.450906862 Simplifying x + 1.083333334 = 2.450906862 Reorder the terms: 1.083333334 + x = 2.450906862 Solving 1.083333334 + x = 2.450906862 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.083333334' to each side of the equation. 1.083333334 + -1.083333334 + x = 2.450906862 + -1.083333334 Combine like terms: 1.083333334 + -1.083333334 = 0.000000000 0.000000000 + x = 2.450906862 + -1.083333334 x = 2.450906862 + -1.083333334 Combine like terms: 2.450906862 + -1.083333334 = 1.367573528 x = 1.367573528 Simplifying x = 1.367573528

Subproblem 2

x + 1.083333334 = -2.450906862 Simplifying x + 1.083333334 = -2.450906862 Reorder the terms: 1.083333334 + x = -2.450906862 Solving 1.083333334 + x = -2.450906862 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.083333334' to each side of the equation. 1.083333334 + -1.083333334 + x = -2.450906862 + -1.083333334 Combine like terms: 1.083333334 + -1.083333334 = 0.000000000 0.000000000 + x = -2.450906862 + -1.083333334 x = -2.450906862 + -1.083333334 Combine like terms: -2.450906862 + -1.083333334 = -3.534240196 x = -3.534240196 Simplifying x = -3.534240196

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.367573528, -3.534240196}

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