(x-3)(x+4)=8

Solution for (x-3)(x+4)=8 equation:

Simplifying
(x + -3)(x + 4) = 8

Reorder the terms:
(-3 + x)(x + 4) = 8

Reorder the terms:
(-3 + x)(4 + x) = 8

Multiply (-3 + x) * (4 + x)
(-3(4 + x) + x(4 + x)) = 8
((4 * -3 + x * -3) + x(4 + x)) = 8
((-12 + -3x) + x(4 + x)) = 8
(-12 + -3x + (4 * x + x * x)) = 8
(-12 + -3x + (4x + x2)) = 8

Combine like terms: -3x + 4x = 1x
(-12 + 1x + x2) = 8

Solving
-12 + 1x + x2 = 8

Solving for variable 'x'.

Reorder the terms:
-12 + -8 + 1x + x2 = 8 + -8

Combine like terms: -12 + -8 = -20
-20 + 1x + x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-20 + 1x + x2 = 0

Factor a trinomial.
(-5 + -1x)(4 + -1x) = 0

Subproblem 1
Set the factor '(-5 + -1x)' equal to zero and attempt to solve:

Simplifying
-5 + -1x = 0

Solving
-5 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '5' to each side of the equation.
-5 + 5 + -1x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1x = 0 + 5
-1x = 0 + 5

Combine like terms: 0 + 5 = 5
-1x = 5

Divide each side by '-1'.
x = -5

Simplifying
x = -5
Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-5, 4}