Which is equivalent to (9y2 - 4x)(9y2 + 4x), and what type of special product is it?
817 - 16x, a perfect square trinomial
817-16x2, the difference of squares
81y* - 72 xy?-16x?, a perfect square trinomial
8174 - 72xy?-16x?, the difference of squares

All of the following changes typically happened in colonies as a result of imperialism, except: a. cultural practices were outlawed. b. they became more economically self-sufficient. c. european nations built modern infrastructure, including railways. d. the european language became the language of government and education.

Plz the 10 places that charles darwin stopped at to report his findings, and include dates?

Plz me on september 17, 1860to the union and confederate army’s fought the in maryland. it was one of the bloodiest battles in the civil war. a. battle of the seven pines. b. battle of antietam c. first battle of bull run. d. second battle of bull run.