Question

(1 + 2i)(2 + i) +
= 5(2 + i)

Answer 1

@kayders1997

Answer 2

@Matt6288

Answer 3

@Directrix

Answer 4

@MathMusician

Answer 5

Is this the equation:\[(1 + 2i)(2 + i) + \]
@sunshinehaggard

Answer 6

yes im trying to find the missing term to the equation

Answer 7

@KendrickLamar2014

Answer 8

let the missing term be x+iy

(1 + 2i)(2 + i) + x+iy = 5(2 + i)

now collect all the terms with and without 'i' on both sides

compare real and imaginary parts :)
try it , let me know if you get stuck.

Answer 9

it was wrong

Answer 10

can you show what have you done?

Answer 11

(1 + 2i)(2 + i) + x+iy = 5(2 + i)

2 + 4i + i + 2i^2 + x + iy = 10 + 5i

so,
2-2 +x = 10
x= 10

5i +iy = 5i
so, y = 0

so, did you put 10 in the blank?

Answer 12

i know where i messed up thank you

Answer 13

welcome ^_^