7z^2+9z+2=0

Solution for 7z^2+9z+2=0 equation:

Simplifying
7z2 + 9z + 2 = 0

Reorder the terms:
2 + 9z + 7z2 = 0

Solving
2 + 9z + 7z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(1 + z)(2 + 7z) = 0

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

Simplifying
1 + z = 0

Solving
1 + z = 0

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

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

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

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

Simplifying
z = -1
Subproblem 2
Set the factor '(2 + 7z)' equal to zero and attempt to solve:

Simplifying
2 + 7z = 0

Solving
2 + 7z = 0

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

Add '-2' to each side of the equation.
2 + -2 + 7z = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 7z = 0 + -2
7z = 0 + -2

Combine like terms: 0 + -2 = -2
7z = -2

Divide each side by '7'.
z = -0.2857142857

Simplifying
z = -0.2857142857
Solution
z = {-1, -0.2857142857}