48=(x-2)(x+8)

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Solution for 48=(x-2)(x+8) equation:


Simplifying
48 = (x + -2)(x + 8)

Reorder the terms:
48 = (-2 + x)(x + 8)

Reorder the terms:
48 = (-2 + x)(8 + x)

Multiply (-2 + x) * (8 + x)
48 = (-2(8 + x) + x(8 + x))
48 = ((8 * -2 + x * -2) + x(8 + x))
48 = ((-16 + -2x) + x(8 + x))
48 = (-16 + -2x + (8 * x + x * x))
48 = (-16 + -2x + (8x + x2))

Combine like terms: -2x + 8x = 6x
48 = (-16 + 6x + x2)

Solving
48 = -16 + 6x + x2

Solving for variable 'x'.

Combine like terms: 48 + 16 = 64
64 + -6x + -1x2 = -16 + 6x + x2 + 16 + -6x + -1x2

Reorder the terms:
64 + -6x + -1x2 = -16 + 16 + 6x + -6x + x2 + -1x2

Combine like terms: -16 + 16 = 0
64 + -6x + -1x2 = 0 + 6x + -6x + x2 + -1x2
64 + -6x + -1x2 = 6x + -6x + x2 + -1x2

Combine like terms: 6x + -6x = 0
64 + -6x + -1x2 = 0 + x2 + -1x2
64 + -6x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
64 + -6x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-64 + 6x + x2 = 0

Move the constant term to the right:

Add '64' to each side of the equation.
-64 + 6x + 64 + x2 = 0 + 64

Reorder the terms:
-64 + 64 + 6x + x2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + 6x + x2 = 0 + 64
6x + x2 = 0 + 64

Combine like terms: 0 + 64 = 64
6x + x2 = 64

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 64 + 9

Reorder the terms:
9 + 6x + x2 = 64 + 9

Combine like terms: 64 + 9 = 73
9 + 6x + x2 = 73

Factor a perfect square on the left side:
(x + 3)(x + 3) = 73

Calculate the square root of the right side: 8.544003745

Break this problem into two subproblems by setting 
(x + 3) equal to 8.544003745 and -8.544003745.

Subproblem 1

x + 3 = 8.544003745 Simplifying x + 3 = 8.544003745 Reorder the terms: 3 + x = 8.544003745 Solving 3 + x = 8.544003745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 8.544003745 + -3 Combine like terms: 3 + -3 = 0 0 + x = 8.544003745 + -3 x = 8.544003745 + -3 Combine like terms: 8.544003745 + -3 = 5.544003745 x = 5.544003745 Simplifying x = 5.544003745

Subproblem 2

x + 3 = -8.544003745 Simplifying x + 3 = -8.544003745 Reorder the terms: 3 + x = -8.544003745 Solving 3 + x = -8.544003745 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -8.544003745 + -3 Combine like terms: 3 + -3 = 0 0 + x = -8.544003745 + -3 x = -8.544003745 + -3 Combine like terms: -8.544003745 + -3 = -11.544003745 x = -11.544003745 Simplifying x = -11.544003745

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.544003745, -11.544003745}

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