Evaluate Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 2x + 3 is an algebraic expression.

Front

Evaluate the expression: 2r + 1 if r = 3.

Back

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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

Evaluate the expression: b^2 + 4 when b = 3.

Back

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Front

What is the formula for the difference of squares?

Back

The difference of squares formula is a^2 - b^2 = (a - b)(a + b).

Front

Evaluate the expression: a^2 - b^2 if a = 4 and b = 2.

Back

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Front

What is a variable in algebra?

Back

A variable is a symbol, usually a letter, that represents an unknown value in an expression or equation.

Front

Evaluate the expression: r + 7 where r = 3.

Back

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Front

What is the purpose of parentheses in algebraic expressions?

Back

Parentheses indicate which operations should be performed first in an expression.

Front

Evaluate the expression: \frac{r}{t} if r = 8 and t = 2.

Back

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