Factor completely and show work

1. t^6 – 64

2. y² + 5y – 84

3.18x^4– 72x²

4.9p² - 54p + 72

5.(x^2 - x - 6)/(x^2 - 9)

Need solving this second acceleration problem.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis