Simplify -9z^3+2z^2-2z^3+z^2

$- 9 z^{3} + 2 z^{2} - 2 z^{3} + z^{2}$

Step 1

Subtract $2 z^{3}$ from $- 9 z^{3}$ .

$- 11 z^{3} + 2 z^{2} + z^{2}$

Step 2

Add $2 z^{2}$ and $z^{2}$ .

$- 11 z^{3} + 3 z^{2}$

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