Question

Rationalize the denominator of

Answer 1

Its just u need to multiply both numerator and denominator with denominator and simplify it

Answer 2

We can write numerator as 7i now it will be easy to simplify and rationalise :)

Answer 3

7i / (7 - 2i -4 - 9i)

7i / (3 - 11i)

Answer 4

Now rationalise denominator by multiplying numerator and denominator with 3 + 11 i

Answer 5

7i ( 3 + 11i) / (3 -11i) (3 + 11i)

21i + 77i^2 / 9 - 121i^2 (Since (a + b) ( a - b) = a^2 - b^2) )

21i - 77/ 9 +121 (Since i^2 = -1)
21i - 77/130

Answer 6

thank you! @ganibl

Answer 7

Mention not :)