Write an equivalent expression for each of the following. Express your answers in the form a + bi or a - bi (5 + i)(9 + i) Help please

Question

asked Jun 18, 2022 225k views

1 Answer

Alekzander · Answer 1 · 2022-06-24T12:56:06+0000

Answer:

44 +14i

Explanation:

(5 + i)(9 + i)

FOIL

first 5*9 = 45

inner: 9i

outer :5i

last: i*i = i^2 = -1

Add togheter

45 + 9i+5i -1

Combine like terms

44 +14i