The formula for finding the area of the circle works because they made it especially for it. I don’t really know how else to describe it, it simply just works.
First of all, it is 2r

and it would be divide by 3.14 (pi) and then you should have the diameter. Then divide by 2 to find radius.
The factorization of 12a^3b^2 +18a²b^2 – 12ab^2 is 
<u>Solution:</u>
Given, expression is 
We have to factorize the given expression completely.
Now, take the expression

Taking
as common term,

Taking "a" as common term,

Taking "6" as common term,

Splitting "3a" as "4a - a" we get,


Hence, the factored form of given expression is 
Answer:
Step-by-step explanation:
hello :
(2x + 9)(3-z) = 0 means : 2x+9=0 or 3-z=0
x= -9/2 or z=3