Answer:
Which i think is the first one, there may just be a typing error.
Step-by-step explanation:
A polynomial of order n has the following format:

In which a is the leading coefficient,
are the roots.
If a root appears m times, they are said to have multiplicity m.
Leading coefficient of 1 and roots 21 and 31 with multiplicity 1

So the correct answer is:

Which i think is the first one, there may just be a typing error.
In exponential for it could be 10 raised to the 5th power or 10^5
Answer:
Sometimes
Step-by-step explanation:
Quadrilaterals are shapes with four sides.
This means some quadrilaterals will have 4 equal sides, others will have <em>no </em>equal sides!
There is no rule determining side length equivalence in quadrilaterals. But those may be sub-classified as other shapes.