Question

how do i do this?
(7-i)(4+2i)
please help

Answer 1

There are different methods. which way did your teacher teach you to use?

Answer 2

she actually forgot to teach us this method

Answer 3

she taught us the ones where you add, subtract, and divide but not multiply

Answer 4

you need to multiply each term by each of the one in the other paran. so 7*4, 7*2i and so on... you understand? afterwards combine like terms

Answer 5

28+10i-1 ?/