Please help me on this asap this is very important :D

Which shows one way to determine the factors of  x3  +  5x2  –  6x  –  30 by grouping? x(x2  –  5)  +  6(x2  –  5)x(x2  +  5)  –  6(x2  +  5)x2(x  –  5)  +  6(x  –  5)x2(x  +  5)  –  6(x  +  5)

Asphere has a diameter of 10 in. what is the volume of the sphere?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.