Answer
v$^4$-5v$^3$-4v$^2$
Work Step by Step
v$^3$(v-9)-2v$^2$(2-2v)
v$^4$(v)+v$^3$(-9)-2v$^2$(2)-2v$^2$(-2v)
v$^4$-9v$^3$-4v$^2$+4v$^3$
v$^4$-9v$^3$+4v$^3$-4v$^2$
v$^4$-5v$^3$-4v$^2$
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