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Answer:
b.
Step-by-step explanation:
The graph can be divided into 4 regions.
Region 1 is for 
Region 2 is for 
Region 3 is for 
Region 4 is for 
So, for the region 1, the values of
goes on decreasing with increasing
. Therefore, the function is decreasing in the interval
.
Now, for the region 2, the values of
increases with increasing
. So, the function is increasing in the interval
.
For the region 3, the the values of
goes on decreasing with increasing
. Therefore, the function is decreasing in the interval
.
Now, for the region 4, the values of
increases with increasing
. So, the function is increasing in the interval
.
Therefore, regions 2 and 4 are the regions when the function is increasing.
Hence, the correct option is b.
Answer:
Step-by-step explanation:
780
Answer:
Option D is correct.
Step-by-step explanation:
We have been given 
We need to tell which one of them will give the perfect square trinomial.
Trinomial is the polynomial with three terms.

If we factorize it by middle term splitting we get:



is the perfect square trinomial.
Therefore, option D is correct