y^2+13y=-42

Solution for y^2+13y=-42 equation:

Simplifying
y2 + 13y = -42

Reorder the terms:
13y + y2 = -42

Solving
13y + y2 = -42

Solving for variable 'y'.

Reorder the terms:
42 + 13y + y2 = -42 + 42

Combine like terms: -42 + 42 = 0
42 + 13y + y2 = 0

Factor a trinomial.
(7 + y)(6 + y) = 0

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

Simplifying
7 + y = 0

Solving
7 + y = 0

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

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

Combine like terms: 7 + -7 = 0
0 + y = 0 + -7
y = 0 + -7

Combine like terms: 0 + -7 = -7
y = -7

Simplifying
y = -7
Subproblem 2
Set the factor '(6 + y)' equal to zero and attempt to solve:

Simplifying
6 + y = 0

Solving
6 + y = 0

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

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

Combine like terms: 6 + -6 = 0
0 + y = 0 + -6
y = 0 + -6

Combine like terms: 0 + -6 = -6
y = -6

Simplifying
y = -6
Solution
y = {-7, -6}