9p^2-16p-4=0

Solution for 9p^2-16p-4=0 equation:

Simplifying
9p2 + -16p + -4 = 0

Reorder the terms:
-4 + -16p + 9p2 = 0

Solving
-4 + -16p + 9p2 = 0

Solving for variable 'p'.

Factor a trinomial.
(-2 + -9p)(2 + -1p) = 0

Subproblem 1
Set the factor '(-2 + -9p)' equal to zero and attempt to solve:

Simplifying
-2 + -9p = 0

Solving
-2 + -9p = 0

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

Add '2' to each side of the equation.
-2 + 2 + -9p = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -9p = 0 + 2
-9p = 0 + 2

Combine like terms: 0 + 2 = 2
-9p = 2

Divide each side by '-9'.
p = -0.2222222222

Simplifying
p = -0.2222222222
Subproblem 2
Set the factor '(2 + -1p)' equal to zero and attempt to solve:

Simplifying
2 + -1p = 0

Solving
2 + -1p = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1p = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1p = 0 + -2
-1p = 0 + -2

Combine like terms: 0 + -2 = -2
-1p = -2

Divide each side by '-1'.
p = 2

Simplifying
p = 2
Solution
p = {-0.2222222222, 2}