Answer:

Step-by-step explanation:
We have the product,
.
On simplifying the product, we get,

i.e. 
i.e. 
Thus, the standard form of the product
is
.
16 meters
explanation:
8+8(since there’s two sides) =16
48-16=32
32/2= 16
so, each longer side is 16 meters
<h3>
The error is -6 </h3>
Step-by-step explanation:
If a line passes through the points
and 
Then the equation of line is

Here given points are (-3,-7.5) and (2,-5)
Then the equation of the line is

⇔
⇔2.5(x+3) = 5(y+7.5)
⇔(x+3)= 2(y+7.5)
⇔x+ 3 = 2y +15
⇔2y = x+3-15
⇔y = 
⇔y = 0.5 x -6
The error is -6