Express in simplest a+bi form: Square root of 1b + Square root of -1b

Lets simplify 
We know 

We cannot simplify 


So a + ib form is 
Answer:
12g8h10
Multiply each variable quantity by 2 and combine.
7/25 because you can divide everything. Y 3
Answer:
90ft
Step-by-step explanation:
I draw it out and add a dotted line to make a triangle and rectangle then you find the area of them individually and add the two together.
Rectangle:
6*3=18
Triangle:
Add the 6+6 together to get the height of the triangle and subtract the 3 from the 15 to get the base
(12*12)
144/
72
Total area:
18+72
90ft