**Answer:**

The answer toyour question is below: b and c

**Step-by-step explanation:**

a) It is not a difference of squares, because 2 does not have an exact root.

b) it is a difference of squares, both terms have exact root

c) it is a difference of squares, both terms have exact root

d) it' s not difference of squares, 24 does not have an exact root.

The answer is that 103 math books were sold and 309 biology books were sold because if you multiply 103 by 3 you will get 309 but then you will still need to add the 103 that we found in the first place which would all add up to 412

**Answer:**

The Answer is D StartFraction StartRoot 3 EndRoot Over 9 EndFraction

**Step-by-step explanation:**

Just took the test one Edge, sorry its late.

$90+25x=240

240-90

150/25

The answer is C.6