Question

Express (2+3i) (2-3i) in the form of a+ib​

Answer 1

Answer:

13 + 0*i

so, a=13 and b=0

Step-by-step explanation:

(2+3i) (2-3i)

= 2² - (3i)²

= 4 - 3² i²

= 4 - 9(-1)

= 4+9

= 13

= 13 + 0*i

so, a=13 and b=0