Algebraic Expressions

Front

What is a variable in an algebraic expression?

Back

A variable is a symbol, often a letter, that represents an unknown value in an expression. For example, in the expression 2x + 3, 'x' is a variable.

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 3x + 5 is an algebraic expression.

Front

Back

4

Front

What is the value of the expression 2x + 3 + x^2 for x = 4?

Back

27

Front

Evaluate the expression 6 + 7b - 3a for a = 2 and b = 8.

Back

56

Front

What are the constants in the expression 5x + 3?

Back

The constant is 3, which does not change regardless of the value of x.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with given numbers.

Front

What is the coefficient in the expression 4x + 7?

Back

The coefficient is 4, which is the number multiplied by the variable x.

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal.

Front

What is the degree of the polynomial 3x^2 + 2x + 1?

Back

The degree is 2, which is the highest exponent of the variable x in the polynomial.