x(x-8)=105

Solution for x(x-8)=105 equation:

Simplifying
x(x + -8) = 105

Reorder the terms:
x(-8 + x) = 105
(-8 * x + x * x) = 105
(-8x + x2) = 105

Solving
-8x + x2 = 105

Solving for variable 'x'.

Reorder the terms:
-105 + -8x + x2 = 105 + -105

Combine like terms: 105 + -105 = 0
-105 + -8x + x2 = 0

Factor a trinomial.
(-7 + -1x)(15 + -1x) = 0

Subproblem 1
Set the factor '(-7 + -1x)' equal to zero and attempt to solve:

Simplifying
-7 + -1x = 0

Solving
-7 + -1x = 0

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

Add '7' to each side of the equation.
-7 + 7 + -1x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -1x = 0 + 7
-1x = 0 + 7

Combine like terms: 0 + 7 = 7
-1x = 7

Divide each side by '-1'.
x = -7

Simplifying
x = -7
Subproblem 2
Set the factor '(15 + -1x)' equal to zero and attempt to solve:

Simplifying
15 + -1x = 0

Solving
15 + -1x = 0

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

Add '-15' to each side of the equation.
15 + -15 + -1x = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 0 + -15
-1x = 0 + -15

Combine like terms: 0 + -15 = -15
-1x = -15

Divide each side by '-1'.
x = 15

Simplifying
x = 15
Solution
x = {-7, 15}