Answer:
first one is 90
second one is 108
Step-by-step explanation:
E - 30. From 6 to 9 is increase of 1.5times
Answer: 
Step-by-step explanation:
We need to apply the following identity:

Then, applying this, you know that for
:

We need to remember that:
and 
Therefore, we need to substitute these values into
.
Then, you get:



The answer is x<2
-2x^5 + 14x^4 - 36x^3 + 52x^2 - 64x + 48=0
Well it will be a simple as grid algebra
3(2+12)+12x5