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Answers by Stephanie J.

vu-4u+2vu-u (answer)

* ^ means "to the power of" v^2u-4u^2+2vu-u   You want to start by finding the variable/variables that go into every single term.   The common term in this example is u (it cannot be v because the term 4u^2 and u do not contain a v variable.)   u(v^2...