Question

please find the x intercepts of the quadratic functions y=-5(x-4)(x-9) and y=-3/4(x+8)(x+12)

Answer 1

when is the product of terms equal to zero?

Answer 2

the "of terms" is prolly poor terminology; just couldnt think of a better descriptor for it

Answer 3

when we multiply factors together, they equal zero when one or more of them are equal to zero

0 = 0bc

0 = a0c

0 = ab0

0 = 000

etc....

Answer 4

ok.. so the answers are

Answer 5

... the answers are whatever makes each factor go zero :/