2(x+1)(x+4)=0

Solution for 2(x+1)(x+4)=0 equation:

Simplifying
2(x + 1)(x + 4) = 0

Reorder the terms:
2(1 + x)(x + 4) = 0

Reorder the terms:
2(1 + x)(4 + x) = 0

Multiply (1 + x) * (4 + x)
2(1(4 + x) + x(4 + x)) = 0
2((4 * 1 + x * 1) + x(4 + x)) = 0
2((4 + 1x) + x(4 + x)) = 0
2(4 + 1x + (4 * x + x * x)) = 0
2(4 + 1x + (4x + x2)) = 0

Combine like terms: 1x + 4x = 5x
2(4 + 5x + x2) = 0
(4 * 2 + 5x * 2 + x2 * 2) = 0
(8 + 10x + 2x2) = 0

Solving
8 + 10x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(4 + 5x + x2) = 0

Factor a trinomial.
2((4 + x)(1 + x)) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(4 + x)' equal to zero and attempt to solve:

Simplifying
4 + x = 0

Solving
4 + x = 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 + x = 0 + -4

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

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

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

Simplifying
1 + x = 0

Solving
1 + x = 0

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

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

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

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

Simplifying
x = -1
Solution
x = {-4, -1}