Question

Remove parentheses and simplify. $$x(b+2)$$

Short answer

The simplified expression is \( xb + 2x \).

Step-by-step solution

Apply the Distributive Property

To remove the parentheses, multiply each term inside the parentheses by the term outside, in this case, multiply both 'b' and '2' by 'x'.

Perform the Multiplication

Multiply x with b to get xb and multiply x with 2 to get 2x.

Write the Simplified Expression

Combine the results of the multiplication to get the final expression without parentheses.

Key concepts

Distributive Property

When simplifying mathematical expressions, the distributive property is a powerful tool. It's a rule that lets you 'distribute' a multiplied number across terms that are added or subtracted inside a set of parentheses. For example, consider the expression \( x(b + 2) \). To simplify this, you apply the distributive property by multiplying the 'x' outside of the parentheses to each term inside: \( x \cdot b \) and \( x \times 2 \). This property ensures that every term within the parentheses is accounted for, avoiding common mistakes that can occur when dealing with algebraic expressions.

Algebraic Expressions

Algebraic expressions are combinations of numbers, variables (like \( x \), \( y \) or \( b \)), and arithmetic operations like addition, subtraction, multiplication, and division. Simplifying these expressions often involves steps like combining like terms or using properties of arithmetic, such as the distributive property explained above. To make things simpler, visualize an algebraic expression as a sentence in the language of mathematics, where every symbol and number contributes to its meaning, just as every word and punctuation mark matters in a written sentence.

Understanding how to manipulate these expressions is crucial in solving algebra problems. When you improve your skills with algebraic expressions, you're able to solve for unknown variables and understand the relations between different mathematical quantities.

Multiplication

Multiplication is one of the basic building blocks of mathematics, often thought of as repeated addition. For example, \( 2 \times 3 \) means adding 2 three times (\( 2 + 2 + 2 \) which equals 6). But when we're dealing with variables, we can't always perform the addition directly since we don't know the value of the variable. That's where multiplication becomes key in algebra.

In our example \( x(b + 2)\), multiplication helps to expand the algebraic expression. You multiply \( x \) by each term in the parentheses to simplify it. Through multiplication, the variables and numbers are combined to form a simplified expression, serving as a basic operation that helps us translate and solve algebraic problems.