Question

yes I need help real

Answer 1

Question:

Solution:

Let the expression:

$\frac{-5\text{ + 7i}}{3-i}$

this expression is equivalent to:

$\frac{-5\text{ + 7i}}{3-i}\text{ x }\frac{3+i}{3+i}\text{ }$

that is

$=\text{ }\frac{(-5+7i)(3+i)}{(3-i)(3+i)}\text{ = }\frac{-22+16i}{10}$

this is equivalent to:

$=\text{ }\frac{-22+16i}{10}\text{ = }\frac{-22}{10}\text{ + }\frac{16}{10}i\text{ }$

then, we can conclude that the correct answer is:

$=\text{ }\frac{-22}{10}\text{ + }\frac{16}{10}i\text{ }$

that is:

$=-2.2\text{ + 1.6}i\text{ }$