(5x+4)*(6x-7)=50

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Solution for (5x+4)*(6x-7)=50 equation:


Simplifying
(5x + 4)(6x + -7) = 50

Reorder the terms:
(4 + 5x)(6x + -7) = 50

Reorder the terms:
(4 + 5x)(-7 + 6x) = 50

Multiply (4 + 5x) * (-7 + 6x)
(4(-7 + 6x) + 5x * (-7 + 6x)) = 50
((-7 * 4 + 6x * 4) + 5x * (-7 + 6x)) = 50
((-28 + 24x) + 5x * (-7 + 6x)) = 50
(-28 + 24x + (-7 * 5x + 6x * 5x)) = 50
(-28 + 24x + (-35x + 30x2)) = 50

Combine like terms: 24x + -35x = -11x
(-28 + -11x + 30x2) = 50

Solving
-28 + -11x + 30x2 = 50

Solving for variable 'x'.

Reorder the terms:
-28 + -50 + -11x + 30x2 = 50 + -50

Combine like terms: -28 + -50 = -78
-78 + -11x + 30x2 = 50 + -50

Combine like terms: 50 + -50 = 0
-78 + -11x + 30x2 = 0

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

Divide each side by '30'.
-2.6 + -0.3666666667x + x2 = 0.0

Move the constant term to the right:

Add '2.6' to each side of the equation.
-2.6 + -0.3666666667x + 2.6 + x2 = 0.0 + 2.6

Reorder the terms:
-2.6 + 2.6 + -0.3666666667x + x2 = 0.0 + 2.6

Combine like terms: -2.6 + 2.6 = 0.0
0.0 + -0.3666666667x + x2 = 0.0 + 2.6
-0.3666666667x + x2 = 0.0 + 2.6

Combine like terms: 0.0 + 2.6 = 2.6
-0.3666666667x + x2 = 2.6

The x term is -0.3666666667x.  Take half its coefficient (-0.1833333334).
Square it (0.03361111114) and add it to both sides.

Add '0.03361111114' to each side of the equation.
-0.3666666667x + 0.03361111114 + x2 = 2.6 + 0.03361111114

Reorder the terms:
0.03361111114 + -0.3666666667x + x2 = 2.6 + 0.03361111114

Combine like terms: 2.6 + 0.03361111114 = 2.63361111114
0.03361111114 + -0.3666666667x + x2 = 2.63361111114

Factor a perfect square on the left side:
(x + -0.1833333334)(x + -0.1833333334) = 2.63361111114

Calculate the square root of the right side: 1.622840445

Break this problem into two subproblems by setting 
(x + -0.1833333334) equal to 1.622840445 and -1.622840445.

Subproblem 1

x + -0.1833333334 = 1.622840445 Simplifying x + -0.1833333334 = 1.622840445 Reorder the terms: -0.1833333334 + x = 1.622840445 Solving -0.1833333334 + x = 1.622840445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1833333334' to each side of the equation. -0.1833333334 + 0.1833333334 + x = 1.622840445 + 0.1833333334 Combine like terms: -0.1833333334 + 0.1833333334 = 0.0000000000 0.0000000000 + x = 1.622840445 + 0.1833333334 x = 1.622840445 + 0.1833333334 Combine like terms: 1.622840445 + 0.1833333334 = 1.8061737784 x = 1.8061737784 Simplifying x = 1.8061737784

Subproblem 2

x + -0.1833333334 = -1.622840445 Simplifying x + -0.1833333334 = -1.622840445 Reorder the terms: -0.1833333334 + x = -1.622840445 Solving -0.1833333334 + x = -1.622840445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1833333334' to each side of the equation. -0.1833333334 + 0.1833333334 + x = -1.622840445 + 0.1833333334 Combine like terms: -0.1833333334 + 0.1833333334 = 0.0000000000 0.0000000000 + x = -1.622840445 + 0.1833333334 x = -1.622840445 + 0.1833333334 Combine like terms: -1.622840445 + 0.1833333334 = -1.4395071116 x = -1.4395071116 Simplifying x = -1.4395071116

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.8061737784, -1.4395071116}

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