0=-x^2-4x-3

Solution for 0=-x^2-4x-3 equation:

Simplifying
0 = -1x2 + -4x + -3

Reorder the terms:
0 = -3 + -4x + -1x2

Solving
0 = -3 + -4x + -1x2

Solving for variable 'x'.

Combine like terms: 0 + 3 = 3
3 + 4x + x2 = -3 + -4x + -1x2 + 3 + 4x + x2

Reorder the terms:
3 + 4x + x2 = -3 + 3 + -4x + 4x + -1x2 + x2

Combine like terms: -3 + 3 = 0
3 + 4x + x2 = 0 + -4x + 4x + -1x2 + x2
3 + 4x + x2 = -4x + 4x + -1x2 + x2

Combine like terms: -4x + 4x = 0
3 + 4x + x2 = 0 + -1x2 + x2
3 + 4x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
3 + 4x + x2 = 0

Factor a trinomial.
(3 + x)(1 + x) = 0

Subproblem 1
Set the factor '(3 + x)' equal to zero and attempt to solve:

Simplifying
3 + x = 0

Solving
3 + x = 0

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 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + x = 0 + -3
x = 0 + -3

Combine like terms: 0 + -3 = -3
x = -3

Simplifying
x = -3
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 = {-3, -1}