What is (2+4i)(-3-3i)

6-18i

Step-by-step explanation:

You solve each one and this is basically simplifying the question

(2+4i)=6

(-3-3i)=-6

3,628,800

Step-by-step explanation:

10 x 9 x 8 x 7 x 6 x 5 x   4 x 3 x 2 x 1

              By using the factorial function we can interpret all the ways that the shoes can be arranged.

               *The factorial function (symbol: !) says to multiply all whole numbers from our chosen number down to 1.