2x+3
2x2 +3
(x-2)/3
What kind of mathematical phrase? can you please cite some examples?
Any "expression" that represents a numeric value. Example: 2+2=4 or x+7=10. Actually the examples above are equations, not expressions. Expressions do not have = signs. 7a and 4x are examples.
A mathematical expression is a collection of numbers and variables along with mathematical operators - other than equalities or inequalities.
It is a more complicated mathematical expression.
Yes, a mathematical expression can have no variables, but such an expression is usually not very useful. An example of a valid expression without variables is: 1+1=2
An expression consists of numbers and variables that may be linked by mathematical functions. Other than in a conditional phrase, an expression may not contain an equality or inequality.
It means "a Mathematical Expression".
Average speed can be represented by the mathematical expression "distance x time."
A numerical expression is simply a set of numbers separate by mathematical operations, but without an equality (or inequality) sign. The equality or inequality sign would make it an equation rather than an expression. Examples of mathematical operations are addition, subtraction, multiplication, division, exponents, logarithms, trigonometric functions, factorials.
A mathematical expression has numbers and operation signs with no equal sign. Equations, on the other hand, do contain equal signs.
EQUATION
It is called "to evaluate" the expression.