Question

PLEASE HELP WILL GIV MEDAL<3

Simplify the given expression.

(1 + 2i) • (5 − 3i)
answers:
2 − 15i

3 + 2i

5 − 6i

11 + 7i

Answer 1

@kelliegirl33

Answer 2

2-15

Answer 3

i get medal

Answer 4

(1 + 2i) • (5 − 3i)

1(5-3i) + 2i(5-3i)

5 - 3i + 10i - 6(-1)
11 + 7i

Answer 5

but how did u get tht answer?

Answer 6

@donka74
That is incorrect.

Answer 7

but how did u get tht answer?

Answer 8

(1 + 2i) • (5 − 3i)
5-3i+10i-6i^2
5+7i-6(-1) :- i^2=-1
5+7i+6
11+7i

Answer 9

1(5-3i) + 2i(5-3i)

now i^2 = -1

5 - 3i + 10i - 6(-1)

Combine like terms [with i and constants]

5+6 + 10i-3i
11 + 7i

Understood? :)

Answer 10

all u do is 1x5 1x-3 2x5 2x-3 add the poisitive an add the negative

Answer 11

yea thx @AkashdeepDeb

Answer 12

:)

Answer 13

who your medal?

Answer 14

what?

Answer 15

@caitlinnr14