Question

multiply (2+5i)(5-2i)

Answer 1

21i

Answer 2

The answer is 20+21i.

Answer 3

Rate if u like:)

Answer 4

\[(a+bi)(c+di)=(ac-bd)+(ad+bc)i\]

Answer 5

\[2 \times 5 - 5 \times (-2)=20\]
\[2 times (-2)+5 \times 5=21\]

Answer 6

so answer is 20 + 20i as agarshna said.

Answer 7

sorry
calculation mistake
its 20+21i

Answer 8

Multiply through getting 10 +25i-4i-10i^2
Consolidate similar terms: 10+21i-10i^2
Take care of the last term as i^2 us equal to a -1 so the last term is 10
final answer is 21i+20

Answer 9

or placing the real term first: 20+21i

Answer 10

Any questions regarding the procedure for obtaining the solution?