Answer:
the answer is that both x and y are acute
The factors of the expression are 
<h3>How to find factors in the expression?</h3>
First group the first two terms and the last two terms together respectively.
The factors of the expression are given by;

Hence, the factors of the expression are
.
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Answer:
The answer to the question is unit.
Step-by-step explanation:
A fixed amount used as a standard of measurement is called a Unit.
Standard units are the units we usually use to measure the weight, length or capacity of objects. The metric system is the main system of measurement units used in science.