Problem 73 - Algebra 1

Question

Apply the distributive property. $$-5 x(y+3)$$

Step-by-Step Solution

Answer

-5xy - 15x

Step 1: Identify the distributive property

Here, the distributive property is -5x multiplied by both y and 3 in the parentheses (y+3).

Step 2: Apply the Distributive Property

To apply the Distributive Property, multiply -5x by y and 3 separately. Thus we get : -5xy - 15x.

Key Concepts

Applying the Distributive Property

The distributive property is a fundamental principle in algebra that allows us to simplify expressions by distributing a multiplier over a sum or difference inside parentheses. Understanding and applying this rule is a key skill in algebra.

Let's explore the exercise \( -5x(y + 3) \) as an example. This expression means that we need to multiply both terms inside the parentheses by \( -5x \). Here's how it works step by step:

• First, identify the terms inside the parentheses, which are \( y \) and \( 3 \).
• Next, multiply each of these terms by \( -5x \) separately.
• For the first term, \( -5x \cdot y = -5xy \).
• For the second term, \( -5x \cdot 3 = -15x \).

After applying the distributive property, we combine the two products to get the simplified expression: \( -5xy - 15x \).

Multiplying Polynomials

Multiplying polynomials involves using the distributive property repeatedly to combine several algebraic terms. A polynomial is an expression consisting of variables and coefficients, involving only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables.

For example, when multiplying two binomials, like \( (x + 2)(x + 3) \) you would apply the distributive property in a step-by-step manner:

• Distribute each term of the first binomial to every term of the second binomial.
• Combine like terms if any appear after distribution.

The result of this process is a new polynomial where all terms have been properly combined. Remember that the distributive property is used multiple times in polynomial multiplication when each term of one polynomial is multiplied by every term of the other polynomial.

Algebraic Expressions Simplification

Simplification of algebraic expressions involves reducing them to their simplest form while maintaining their original value. This often includes applying the distributive property, combining like terms, and factoring, among other techniques.

For an expression like \( -5x(y + 3) + 2xy - 6x \), you would simplify it by:

• First applying the distributive property to \( -5x(y + 3) \) which results in \( -5xy - 15x \) as we identified earlier.
• Then combining like terms with \( 2xy \) and \( -6x \) consecutively, if there are any to combine.

The simplification of algebraic expressions often leads to a more compact form, making it easier to evaluate or use in further calculations. It's important to proceed with each step methodically to ensure accuracy in the simplification process.