(3x+4)(8x+4)=140

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Solution for (3x+4)(8x+4)=140 equation:


Simplifying
(3x + 4)(8x + 4) = 140

Reorder the terms:
(4 + 3x)(8x + 4) = 140

Reorder the terms:
(4 + 3x)(4 + 8x) = 140

Multiply (4 + 3x) * (4 + 8x)
(4(4 + 8x) + 3x * (4 + 8x)) = 140
((4 * 4 + 8x * 4) + 3x * (4 + 8x)) = 140
((16 + 32x) + 3x * (4 + 8x)) = 140
(16 + 32x + (4 * 3x + 8x * 3x)) = 140
(16 + 32x + (12x + 24x2)) = 140

Combine like terms: 32x + 12x = 44x
(16 + 44x + 24x2) = 140

Solving
16 + 44x + 24x2 = 140

Solving for variable 'x'.

Reorder the terms:
16 + -140 + 44x + 24x2 = 140 + -140

Combine like terms: 16 + -140 = -124
-124 + 44x + 24x2 = 140 + -140

Combine like terms: 140 + -140 = 0
-124 + 44x + 24x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-31 + 11x + 6x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-31 + 11x + 6x2)' equal to zero and attempt to solve: Simplifying -31 + 11x + 6x2 = 0 Solving -31 + 11x + 6x2 = 0 Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -5.166666667 + 1.833333333x + x2 = 0 Move the constant term to the right: Add '5.166666667' to each side of the equation. -5.166666667 + 1.833333333x + 5.166666667 + x2 = 0 + 5.166666667 Reorder the terms: -5.166666667 + 5.166666667 + 1.833333333x + x2 = 0 + 5.166666667 Combine like terms: -5.166666667 + 5.166666667 = 0.000000000 0.000000000 + 1.833333333x + x2 = 0 + 5.166666667 1.833333333x + x2 = 0 + 5.166666667 Combine like terms: 0 + 5.166666667 = 5.166666667 1.833333333x + x2 = 5.166666667 The x term is 1.833333333x. Take half its coefficient (0.9166666665). Square it (0.8402777775) and add it to both sides. Add '0.8402777775' to each side of the equation. 1.833333333x + 0.8402777775 + x2 = 5.166666667 + 0.8402777775 Reorder the terms: 0.8402777775 + 1.833333333x + x2 = 5.166666667 + 0.8402777775 Combine like terms: 5.166666667 + 0.8402777775 = 6.0069444445 0.8402777775 + 1.833333333x + x2 = 6.0069444445 Factor a perfect square on the left side: (x + 0.9166666665)(x + 0.9166666665) = 6.0069444445 Calculate the square root of the right side: 2.450906862 Break this problem into two subproblems by setting (x + 0.9166666665) equal to 2.450906862 and -2.450906862.

Subproblem 1

x + 0.9166666665 = 2.450906862 Simplifying x + 0.9166666665 = 2.450906862 Reorder the terms: 0.9166666665 + x = 2.450906862 Solving 0.9166666665 + x = 2.450906862 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9166666665' to each side of the equation. 0.9166666665 + -0.9166666665 + x = 2.450906862 + -0.9166666665 Combine like terms: 0.9166666665 + -0.9166666665 = 0.0000000000 0.0000000000 + x = 2.450906862 + -0.9166666665 x = 2.450906862 + -0.9166666665 Combine like terms: 2.450906862 + -0.9166666665 = 1.5342401955 x = 1.5342401955 Simplifying x = 1.5342401955

Subproblem 2

x + 0.9166666665 = -2.450906862 Simplifying x + 0.9166666665 = -2.450906862 Reorder the terms: 0.9166666665 + x = -2.450906862 Solving 0.9166666665 + x = -2.450906862 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9166666665' to each side of the equation. 0.9166666665 + -0.9166666665 + x = -2.450906862 + -0.9166666665 Combine like terms: 0.9166666665 + -0.9166666665 = 0.0000000000 0.0000000000 + x = -2.450906862 + -0.9166666665 x = -2.450906862 + -0.9166666665 Combine like terms: -2.450906862 + -0.9166666665 = -3.3675735285 x = -3.3675735285 Simplifying x = -3.3675735285

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5342401955, -3.3675735285}

Solution

x = {1.5342401955, -3.3675735285}

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