Perform the modular arithmetic. (7 · 15) (mod 4)

We could do it by first writing

so that

and since , we have

# # #

Alternatively, we can just compute the product and take it mod 4:

and so we get the same result of 1.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

all it means is function 3