A^2+b^2=c^2
a^2+9^2=15^2
a^2+81=225
-81 -81
a^2= 144 (square root both sides)
a=12
Complete Question
The complete question is shown on the first uploaded image
Answer:
it is convergent and the solution is 
Step-by-step explanation:
From the question we are given

When integrated

![= 33[ \frac{\pi }{2} - 0]](https://tex.z-dn.net/?f=%3D%20%2033%5B%20%5Cfrac%7B%5Cpi%20%7D%7B2%7D%20%20-%200%5D)

This implies that the integral converges
Y= -6(negative six). 12 is smaller than 18 and 12+6 is 18 so you make it negitive
Answer: y = 1
so 1! hopefully I helped!
Step-by-step explanation:
The correct answer is the option "B":
B.(-x-6i)(x-6i)
Explanation
You must keep in mind the following:
1. By definition, a complex number has the following form:
a+bi
"a" is the real part and "b" is the imaginary part.
2. i²=-1
3. Then,you have:
(-x-6i)(x-6i)=(-x²+(6i)²)=-x²-36
4. Therefore, the answer is: (-x-6i)(x-6i)