Question

Perform the operations & write result in standard form. (4+3i)(2-5i) Is this done by distribution?

Answer 1

use foil

Answer 2

thought so.

Answer 3

but watch-- the multipication of i can be a little tricky

Answer 4

how so. Isn't it a matter on combining like terms?

Answer 5

Have so far 8-20i=6i-15i=

Answer 6

should be 8-20i+6i-15i

Answer 7

yes but what do you get here
8-20i+6i-15i^2
8-14i+15
23-14i

Answer 8

you forgot to square the i and i^2=-1

Answer 9

So.... answer should be 8-14i+15

Answer 10

yes but standar form is a-bi
so8+15=23
so 23-14i

Answer 11

ok