Select the correct answer. Which function has a zero with a multiplicity of 2?
f(x) = x2 + 3x + 9
f(x) = 3x2 + 24x + 48
f(x) = -3x2 + 12x + 12
f(x) = x2 - 2x - 1

Please help fast !!

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?