Idont get #! i need someone to explain! whoever answers correctly will be marked as plz

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)

Which strategy is used by public health to reduce the incidence of food poisoning?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air