Factor 9y^2z^2-81y^3z^2-90y^2z^4

$9 y^{2} z^{2} - 81 y^{3} z^{2} - 90 y^{2} z^{4}$

Reorder the expression.

Move $9 y^{2} z^{2}$ .

$- 81 y^{3} z^{2} - 90 y^{2} z^{4} + 9 y^{2} z^{2}$

Reorder $- 81 y^{3} z^{2}$ and $- 90 y^{2} z^{4}$ .

$- 90 y^{2} z^{4} - 81 y^{3} z^{2} + 9 y^{2} z^{2}$

Factor $- 9 y^{2} z^{2}$ out of $- 90 y^{2} z^{4}$ .

$- 9 y^{2} z^{2} (10 z^{2}) - 81 y^{3} z^{2} + 9 y^{2} z^{2}$

Factor $- 9 y^{2} z^{2}$ out of $- 81 y^{3} z^{2}$ .

$- 9 y^{2} z^{2} (10 z^{2}) - 9 y^{2} z^{2} (9 y) + 9 y^{2} z^{2}$

Factor $- 9 y^{2} z^{2}$ out of $9 y^{2} z^{2}$ .

$- 9 y^{2} z^{2} (10 z^{2}) - 9 y^{2} z^{2} (9 y) - 9 y^{2} z^{2} (- 1)$

Factor $- 9 y^{2} z^{2}$ out of $- 9 y^{2} z^{2} (10 z^{2}) - 9 y^{2} z^{2} (9 y)$ .

$- 9 y^{2} z^{2} (10 z^{2} + 9 y) - 9 y^{2} z^{2} (- 1)$

Factor $- 9 y^{2} z^{2}$ out of $- 9 y^{2} z^{2} (10 z^{2} + 9 y) - 9 y^{2} z^{2} (- 1)$ .

$- 9 y^{2} z^{2} (10 z^{2} + 9 y - 1)$