(5x-5)(x-8)=-34+76

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Solution for (5x-5)(x-8)=-34+76 equation:


Simplifying
(5x + -5)(x + -8) = -34 + 76

Reorder the terms:
(-5 + 5x)(x + -8) = -34 + 76

Reorder the terms:
(-5 + 5x)(-8 + x) = -34 + 76

Multiply (-5 + 5x) * (-8 + x)
(-5(-8 + x) + 5x * (-8 + x)) = -34 + 76
((-8 * -5 + x * -5) + 5x * (-8 + x)) = -34 + 76
((40 + -5x) + 5x * (-8 + x)) = -34 + 76
(40 + -5x + (-8 * 5x + x * 5x)) = -34 + 76
(40 + -5x + (-40x + 5x2)) = -34 + 76

Combine like terms: -5x + -40x = -45x
(40 + -45x + 5x2) = -34 + 76

Combine like terms: -34 + 76 = 42
40 + -45x + 5x2 = 42

Solving
40 + -45x + 5x2 = 42

Solving for variable 'x'.

Reorder the terms:
40 + -42 + -45x + 5x2 = 42 + -42

Combine like terms: 40 + -42 = -2
-2 + -45x + 5x2 = 42 + -42

Combine like terms: 42 + -42 = 0
-2 + -45x + 5x2 = 0

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

Divide each side by '5'.
-0.4 + -9x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -9x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -9x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -9x + x2 = 0 + 0.4
-9x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-9x + x2 = 0.4

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 0.4 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 0.4 + 20.25

Combine like terms: 0.4 + 20.25 = 20.65
20.25 + -9x + x2 = 20.65

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 20.65

Calculate the square root of the right side: 4.544227107

Break this problem into two subproblems by setting 
(x + -4.5) equal to 4.544227107 and -4.544227107.

Subproblem 1

x + -4.5 = 4.544227107 Simplifying x + -4.5 = 4.544227107 Reorder the terms: -4.5 + x = 4.544227107 Solving -4.5 + x = 4.544227107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 4.544227107 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 4.544227107 + 4.5 x = 4.544227107 + 4.5 Combine like terms: 4.544227107 + 4.5 = 9.044227107 x = 9.044227107 Simplifying x = 9.044227107

Subproblem 2

x + -4.5 = -4.544227107 Simplifying x + -4.5 = -4.544227107 Reorder the terms: -4.5 + x = -4.544227107 Solving -4.5 + x = -4.544227107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -4.544227107 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -4.544227107 + 4.5 x = -4.544227107 + 4.5 Combine like terms: -4.544227107 + 4.5 = -0.044227107 x = -0.044227107 Simplifying x = -0.044227107

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.044227107, -0.044227107}

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