For i = √−1 , what is the sum (7 + i) + (−8 + 9i ) ? √ is the square root symbol.
a) −1 + 12i
b) −1 − 6i
c) 15 + 12i
d) 15 − 6i

Question is incomplete, complete question is given below;

For i = √−1 , what is the sum (7 + 3i) + (−8 + 9i ) ? √ is the square root symbol.

A) −1 + 12i

Step-by-step explanation:

Given,

We have to find the sum of.

Solution,

Firstly we Substitute the the value of 'i' in given expression.

On combining the like terms, we get;

On we use the addition property of equality and get;

Since = i

Then we can say that;

=

Hence The sum of is  .

the answer is 844

step-by-step explanation:

it is 844 because if you add 836.50 + 7.5 you will get 844

a thesis statement is not a fact or a question

step-by-step explanation:

a thesis statement is a topic it is not a fact or a question