MCQ - 53-8785

Correct Answer: D

Explanation:

To find the order of the expression, first define what the order of an expression represents.
In a general example,

${\displaystyle a{x}^n}$

a represents the coefficient of the x term and n represents the degree or order of the expression.
When there are more than one term in an expression such as,
x²+y³+xy³
the order of that expression is the highest degree on a given term.
In mathematical terms,
x² → Degree = 2y³ → Degree = 3xy³ → Degree = 1 + 3 = 4
therefore the order of the expression is four.
Looking at the specific expression in question the following is seen.
2x² + xy + y³
2x² → Degree = 2xy → Degree = 1 + 1 = 2y³ → Degree = 3
Therefore, the order of the expression is three.