(x+8)(x-3)=119

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Solution for (x+8)(x-3)=119 equation:


Simplifying
(x + 8)(x + -3) = 119

Reorder the terms:
(8 + x)(x + -3) = 119

Reorder the terms:
(8 + x)(-3 + x) = 119

Multiply (8 + x) * (-3 + x)
(8(-3 + x) + x(-3 + x)) = 119
((-3 * 8 + x * 8) + x(-3 + x)) = 119
((-24 + 8x) + x(-3 + x)) = 119
(-24 + 8x + (-3 * x + x * x)) = 119
(-24 + 8x + (-3x + x2)) = 119

Combine like terms: 8x + -3x = 5x
(-24 + 5x + x2) = 119

Solving
-24 + 5x + x2 = 119

Solving for variable 'x'.

Reorder the terms:
-24 + -119 + 5x + x2 = 119 + -119

Combine like terms: -24 + -119 = -143
-143 + 5x + x2 = 119 + -119

Combine like terms: 119 + -119 = 0
-143 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '143' to each side of the equation.
-143 + 5x + 143 + x2 = 0 + 143

Reorder the terms:
-143 + 143 + 5x + x2 = 0 + 143

Combine like terms: -143 + 143 = 0
0 + 5x + x2 = 0 + 143
5x + x2 = 0 + 143

Combine like terms: 0 + 143 = 143
5x + x2 = 143

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 143 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 143 + 6.25

Combine like terms: 143 + 6.25 = 149.25
6.25 + 5x + x2 = 149.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 149.25

Calculate the square root of the right side: 12.216791723

Break this problem into two subproblems by setting 
(x + 2.5) equal to 12.216791723 and -12.216791723.

Subproblem 1

x + 2.5 = 12.216791723 Simplifying x + 2.5 = 12.216791723 Reorder the terms: 2.5 + x = 12.216791723 Solving 2.5 + x = 12.216791723 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 12.216791723 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 12.216791723 + -2.5 x = 12.216791723 + -2.5 Combine like terms: 12.216791723 + -2.5 = 9.716791723 x = 9.716791723 Simplifying x = 9.716791723

Subproblem 2

x + 2.5 = -12.216791723 Simplifying x + 2.5 = -12.216791723 Reorder the terms: 2.5 + x = -12.216791723 Solving 2.5 + x = -12.216791723 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -12.216791723 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -12.216791723 + -2.5 x = -12.216791723 + -2.5 Combine like terms: -12.216791723 + -2.5 = -14.716791723 x = -14.716791723 Simplifying x = -14.716791723

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.716791723, -14.716791723}

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