Question

A fraction has a denominator of 2 + 7i. What is multiplied with the fraction to rationalize the fraction?

Answer 1

options:
2 + 7i

7 + 2i

2 – 7i

7 – 2i s

Answer 2

You multiply by the conjugate, which is 2-7i.

Answer 3

oh, so it's the first one?

Answer 4

wait

Answer 5

I mean 3rd one

Answer 6

?

Answer 7

Lets define : A/(2+7i)
to get rid of the complex number in the denominator you must use the conjugate thats because of the difference of two square apply two complex numbers ( a+bi) (a-bi) = a^2 +b^2
so the answer will be 2-2i because it makes 4+49 =53 in the denominator

Answer 8

thank you for clearing that up with me

Answer 9

wait, don't you mean 2-7i?