You can do left to right because it is in parentheses
Answer:
= (a + <u>4</u>) (a - <u>4</u>)
Step-by-step explanation:
The given equation is 
Now, By ALGEBRAIC IDENTITY:

Here, taking
, we get b = 4
as 
So, the right hand side of
is (a + 4) (a-4)
48/6=8
8*3=24
24 yards of trim
A + s = 448
s = a - 52
a + a - 52 = 448
2a - 52 = 448
2a = 448 + 52
2a = 500
a = 500/2
a = 250 <=== adults
s = a - 52
s = 250 - 52
s = 198 <== students