(2z^2+11z+15)=0

Solution for (2z^2+11z+15)=0 equation:

Simplifying
(2z2 + 11z + 15) = 0

Reorder the terms:
(15 + 11z + 2z2) = 0

Remove parenthesis around (15 + 11z + 2z2)
15 + 11z + 2z2 = 0

Solving
15 + 11z + 2z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(3 + z)(5 + 2z) = 0

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

Simplifying
3 + z = 0

Solving
3 + z = 0

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

Add '-3' to each side of the equation.
3 + -3 + z = 0 + -3

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

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

Simplifying
z = -3
Subproblem 2
Set the factor '(5 + 2z)' equal to zero and attempt to solve:

Simplifying
5 + 2z = 0

Solving
5 + 2z = 0

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

Add '-5' to each side of the equation.
5 + -5 + 2z = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 2z = 0 + -5
2z = 0 + -5

Combine like terms: 0 + -5 = -5
2z = -5

Divide each side by '2'.
z = -2.5

Simplifying
z = -2.5
Solution
z = {-3, -2.5}