(5x+7)(2x-14)=6

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Solution for (5x+7)(2x-14)=6 equation:


Simplifying
(5x + 7)(2x + -14) = 6

Reorder the terms:
(7 + 5x)(2x + -14) = 6

Reorder the terms:
(7 + 5x)(-14 + 2x) = 6

Multiply (7 + 5x) * (-14 + 2x)
(7(-14 + 2x) + 5x * (-14 + 2x)) = 6
((-14 * 7 + 2x * 7) + 5x * (-14 + 2x)) = 6
((-98 + 14x) + 5x * (-14 + 2x)) = 6
(-98 + 14x + (-14 * 5x + 2x * 5x)) = 6
(-98 + 14x + (-70x + 10x2)) = 6

Combine like terms: 14x + -70x = -56x
(-98 + -56x + 10x2) = 6

Solving
-98 + -56x + 10x2 = 6

Solving for variable 'x'.

Reorder the terms:
-98 + -6 + -56x + 10x2 = 6 + -6

Combine like terms: -98 + -6 = -104
-104 + -56x + 10x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-104 + -56x + 10x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-52 + -28x + 5x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-52 + -28x + 5x2)' equal to zero and attempt to solve: Simplifying -52 + -28x + 5x2 = 0 Solving -52 + -28x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -10.4 + -5.6x + x2 = 0 Move the constant term to the right: Add '10.4' to each side of the equation. -10.4 + -5.6x + 10.4 + x2 = 0 + 10.4 Reorder the terms: -10.4 + 10.4 + -5.6x + x2 = 0 + 10.4 Combine like terms: -10.4 + 10.4 = 0.0 0.0 + -5.6x + x2 = 0 + 10.4 -5.6x + x2 = 0 + 10.4 Combine like terms: 0 + 10.4 = 10.4 -5.6x + x2 = 10.4 The x term is -5.6x. Take half its coefficient (-2.8). Square it (7.84) and add it to both sides. Add '7.84' to each side of the equation. -5.6x + 7.84 + x2 = 10.4 + 7.84 Reorder the terms: 7.84 + -5.6x + x2 = 10.4 + 7.84 Combine like terms: 10.4 + 7.84 = 18.24 7.84 + -5.6x + x2 = 18.24 Factor a perfect square on the left side: (x + -2.8)(x + -2.8) = 18.24 Calculate the square root of the right side: 4.270831301 Break this problem into two subproblems by setting (x + -2.8) equal to 4.270831301 and -4.270831301.

Subproblem 1

x + -2.8 = 4.270831301 Simplifying x + -2.8 = 4.270831301 Reorder the terms: -2.8 + x = 4.270831301 Solving -2.8 + x = 4.270831301 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + x = 4.270831301 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + x = 4.270831301 + 2.8 x = 4.270831301 + 2.8 Combine like terms: 4.270831301 + 2.8 = 7.070831301 x = 7.070831301 Simplifying x = 7.070831301

Subproblem 2

x + -2.8 = -4.270831301 Simplifying x + -2.8 = -4.270831301 Reorder the terms: -2.8 + x = -4.270831301 Solving -2.8 + x = -4.270831301 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + x = -4.270831301 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + x = -4.270831301 + 2.8 x = -4.270831301 + 2.8 Combine like terms: -4.270831301 + 2.8 = -1.470831301 x = -1.470831301 Simplifying x = -1.470831301

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.070831301, -1.470831301}

Solution

x = {7.070831301, -1.470831301}

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