5(x-5)(x+1)+6(x-5)=2

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Solution for 5(x-5)(x+1)+6(x-5)=2 equation:


Simplifying
5(x + -5)(x + 1) + 6(x + -5) = 2

Reorder the terms:
5(-5 + x)(x + 1) + 6(x + -5) = 2

Reorder the terms:
5(-5 + x)(1 + x) + 6(x + -5) = 2

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

Combine like terms: -5x + 1x = -4x
5(-5 + -4x + x2) + 6(x + -5) = 2
(-5 * 5 + -4x * 5 + x2 * 5) + 6(x + -5) = 2
(-25 + -20x + 5x2) + 6(x + -5) = 2

Reorder the terms:
-25 + -20x + 5x2 + 6(-5 + x) = 2
-25 + -20x + 5x2 + (-5 * 6 + x * 6) = 2
-25 + -20x + 5x2 + (-30 + 6x) = 2

Reorder the terms:
-25 + -30 + -20x + 6x + 5x2 = 2

Combine like terms: -25 + -30 = -55
-55 + -20x + 6x + 5x2 = 2

Combine like terms: -20x + 6x = -14x
-55 + -14x + 5x2 = 2

Solving
-55 + -14x + 5x2 = 2

Solving for variable 'x'.

Reorder the terms:
-55 + -2 + -14x + 5x2 = 2 + -2

Combine like terms: -55 + -2 = -57
-57 + -14x + 5x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-57 + -14x + 5x2 = 0

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

Divide each side by '5'.
-11.4 + -2.8x + x2 = 0

Move the constant term to the right:

Add '11.4' to each side of the equation.
-11.4 + -2.8x + 11.4 + x2 = 0 + 11.4

Reorder the terms:
-11.4 + 11.4 + -2.8x + x2 = 0 + 11.4

Combine like terms: -11.4 + 11.4 = 0.0
0.0 + -2.8x + x2 = 0 + 11.4
-2.8x + x2 = 0 + 11.4

Combine like terms: 0 + 11.4 = 11.4
-2.8x + x2 = 11.4

The x term is -2.8x.  Take half its coefficient (-1.4).
Square it (1.96) and add it to both sides.

Add '1.96' to each side of the equation.
-2.8x + 1.96 + x2 = 11.4 + 1.96

Reorder the terms:
1.96 + -2.8x + x2 = 11.4 + 1.96

Combine like terms: 11.4 + 1.96 = 13.36
1.96 + -2.8x + x2 = 13.36

Factor a perfect square on the left side:
(x + -1.4)(x + -1.4) = 13.36

Calculate the square root of the right side: 3.655133377

Break this problem into two subproblems by setting 
(x + -1.4) equal to 3.655133377 and -3.655133377.

Subproblem 1

x + -1.4 = 3.655133377 Simplifying x + -1.4 = 3.655133377 Reorder the terms: -1.4 + x = 3.655133377 Solving -1.4 + x = 3.655133377 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = 3.655133377 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = 3.655133377 + 1.4 x = 3.655133377 + 1.4 Combine like terms: 3.655133377 + 1.4 = 5.055133377 x = 5.055133377 Simplifying x = 5.055133377

Subproblem 2

x + -1.4 = -3.655133377 Simplifying x + -1.4 = -3.655133377 Reorder the terms: -1.4 + x = -3.655133377 Solving -1.4 + x = -3.655133377 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = -3.655133377 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = -3.655133377 + 1.4 x = -3.655133377 + 1.4 Combine like terms: -3.655133377 + 1.4 = -2.255133377 x = -2.255133377 Simplifying x = -2.255133377

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.055133377, -2.255133377}

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