Answer : A
We need to simplify the given expression
Lets factor numerator first
=(2x+1)(x-3)
=(x+5)(x+3)
Now we factor the denominator
=(x+5)(x-4)
=(2x+1)(x-4)
Now we simplify it

Now cancel out same factors. so we left with

Now multiply the factors

Answer:
the square root of 306 is
17.49
8 : 4
16 : 8
4 : 2
Simplest:
2 : 1
The temperature would be -10 degrees
28, 14, 7, 0 is a sequence for this