/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 40 Simplify $$\left(3 x^{1 / 2}\r... [FREE SOLUTION] | 91Ó°ÊÓ

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Simplify $$\left(3 x^{1 / 2}\right)\left(-2 x^{3 / 2}\right)$$

Short Answer

Expert verified
The simplified expression is \(-6x^2\).

Step by step solution

01

Understand the Problem

We have the expression \( (3x^{1/2})(-2x^{3/2}) \). We need to simplify it by multiplying the coefficients and adding the exponents of the same base.
02

Multiply the Coefficients

Identify and multiply the coefficients: \(3\) and \(-2\). This gives us \( 3 \times (-2) = -6 \).
03

Add the Exponents

For the variables with the same base \(x\), add their exponents: \((1/2) + (3/2) = 4/2 = 2\).
04

Write the Simplified Expression

Combine the results from the previous steps: the simplified expression is \(-6x^2\).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Multiplying Coefficients
In algebra, when multiplying expressions, particularly those with coefficients, it's important to tackle each part separately. Coefficients are the numerical part of terms in an expression that are multiplied by variables. For our exercise, we have the coefficients 3 and -2. The rule is straightforward: simply multiply these numbers together. This involves a basic arithmetic operation:
  • Multiply 3 and -2 to get -6.
Coefficients don't have variables attached to them, so they are easier to handle compared to other parts of the expression. This multiplication step is crucial before moving to involve the exponents. Familiarizing oneself with similar simple arithmetic can help build confidence in handling algebraic expressions.
Adding Exponents
Exponents may seem daunting, but understanding them is key to algebra. In the given expression, we aim to multiply terms with the same base, in this case, the base is \(x\). Each of these terms has an exponent attached.In our exercise, we have \(x^{1/2}\) and \(x^{3/2}\). The rule for multiplying like bases is to add the exponents:
  • Add \(1/2\) and \(3/2\) together.
This results in \(4/2\), which simplifies to 2. This means the exponents can be combined into a single term, \(x^2\). Exponent addition works because multiplying powers of the same base extends the degree of that base in the expression. This method of adding exponents is consistent whenever you see like bases in algebra.
Exponents Rules
Mastering the rules of exponents is pivotal to simplifying expressions. There are a few fundamental rules to remember:
  • Product of Powers Rule: To multiply powers with the same base, add their exponents: \(a^m \cdot a^n = a^{m+n}\).
  • Power of a Power Rule: To raise a power to another power, multiply the exponents: \((a^m)^n = a^{mn}\).
  • Power of a Product Rule: To apply an exponent to a product, apply it to each factor: \((ab)^m = a^m \cdot b^m\).
In our context, we applied the Product of Powers rule, ensuring that we added the exponents \((1/2 + 3/2)\) to achieve \(x^2\). Understanding these rules not only helps in algebra but lays the groundwork for more advanced math topics.
Simplified Expressions
The goal of simplifying expressions is to reduce them to their most concise form while retaining the same value or meaning. The original expression \((3x^{1/2})(-2x^{3/2})\) is simplified to \(-6x^2\). This simplification comes from:
  • Multiplying the coefficients to get \(-6\).
  • Adding the exponents of like bases to get \(x^2\).
This concise expression is not only easier to understand but is also more functional in equations where the variable \(x\) might need to be solved for. Simplified expressions are critical for clear mathematical communication, problem-solving, and even in applied scenarios like calculating areas or modeling real-world problems.

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Most popular questions from this chapter

When a tomado passes near a building, there is a rapid drop in the outdoor pressure and the indoor pressure does not have time to change. The resulting difference is capable of causing an outward pressure of \(1.4 \mathrm{Ib} / \mathrm{in}^{2}\) on the walls and ceiling of the building. (a) Calculate the force in pounds exerted on 1 square foot of a wall. (b) Estimate the tons of force exerted on a wall that is 8 feet high and 40 feet wide.

Urban areas have higher average air temperatures than rural areas, as a result of the presence of buildings, asphalt, and concrete. This phenomenon has become known as the urban heat island. The temperature difference \(T\) (in "C) between urban and rural areas near Montreal, with a population \(P\) between 1000 and \(1,000,000,\) can be described by the formula \(T=0.25 P^{1 / 4} / \sqrt{v},\) where \(v\) is the average wind speed (in \(\mathrm{mi} / \mathrm{hr}\) ) and \(v \geq 1 .\) If \(T=3\) and \(v=5,\) find \(P.\)

Simplify the expression, and rationalize the denominator when appropriate. $$\frac{1}{\sqrt[3]{2}}$$

Valume of a box From a rectangular piece of metal having dimensions 24 inches by 36 inches, an open box is to be made by cutting out an identical square of area \(x^{2}\) from each corner and turning up the sides. (a) Determine an equation for the volume \(V\) of the box in terms of \(x .\) (b) Use a table utility to approximate the value of \(x\) within \(\pm 0.1\) inch that will produce the maximum volume.

Replace the symbol \(\square\) with elther \(=\) or \(\neq\) to make the resulting statement true, whenever the expression has meaning. Give a reason for your answer. \(\sqrt{a^{r}} \square(\sqrt{a})\)

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