2. Factor and explain your reasoning. a. x 2 + 6x + 9
b. x2 - 9
c. x2 - 6x + 9

Could you help me with this?

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?

Find the area of the surface obtained by rotating the curve z=4e^2y from y = 0 to y =1 about the y-axis. the area is square units