Answer:
20.
Given, complex number is 10+5i .
We need to find sum of the given complex number and its conjugate. The conjugate of 10+5i is 10-5i. Therefore, the sum will be 10+5i+10−5i=20.
The answer to this problem is B
We do so to follow the rule of divisibility of each term(numbers).
<h2 /><h3><u>The Rule of Divisibility:</u></h3>
The rule of divisibility of numbers is a method applied in mathematics used to determine if a number or set of numbers is divisible by a particular integer without any remainder.
Let assume that we have a series of numbers;
From the rule of divisibility, since all the numbers are multiples of 2;
We can deduce that 2 can be the factor that is pulled out from the series to divide each term in the sum.
Learn more about the rule of divisibility here:
brainly.com/question/840412
1.75, 2.75, 4
hope this helps!
