x(x+2)=3(3+5)

Solution for x(x+2)=3(3+5) equation:

Simplifying
x(x + 2) = 3(3 + 5)

Reorder the terms:
x(2 + x) = 3(3 + 5)
(2 * x + x * x) = 3(3 + 5)
(2x + x2) = 3(3 + 5)

Combine like terms: 3 + 5 = 8
2x + x2 = 3(8)

Multiply 3 * 8
2x + x2 = 24

Solving
2x + x2 = 24

Solving for variable 'x'.

Reorder the terms:
-24 + 2x + x2 = 24 + -24

Combine like terms: 24 + -24 = 0
-24 + 2x + x2 = 0

Factor a trinomial.
(-6 + -1x)(4 + -1x) = 0

Subproblem 1
Set the factor '(-6 + -1x)' equal to zero and attempt to solve:

Simplifying
-6 + -1x = 0

Solving
-6 + -1x = 0

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

Add '6' to each side of the equation.
-6 + 6 + -1x = 0 + 6

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

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

Divide each side by '-1'.
x = -6

Simplifying
x = -6
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 = {-6, 4}