Chapter 9: Problem 46
Simplify. $$ \sqrt{81 p^{24} q^{6}} $$
Short Answer
Expert verified
The simplified form is \ 9 p^{12} q^3 \.
Step by step solution
01
- Simplify the Constant
First, simplify the constant inside the square root. The square root of 81 is 9 because \(9^2 = 81\). Thus, \[ \sqrt{81 p^{24} q^{6}} = \sqrt{81} \cdot \sqrt{p^{24}} \cdot \sqrt{q^{6}} \Rightarrow 9 \cdot \sqrt{p^{24}} \cdot \sqrt{q^{6}} \].
02
- Simplify the Variable with Power of 24
Next, simplify \sqrt{p^{24}}. The square root of \p^{24} is \p^{24/2}. This simplifies to \p^{12}. Thus, \[ 9 \cdot p^{12} \cdot \sqrt{q^{6}} \].
03
- Simplify the Variable with Power of 6
Now, simplify \sqrt{q^6}. The square root of \q^6 is \q^{6/2}. This simplifies to \q^3. Thus, \[ 9 \cdot p^{12} \cdot q^3 \Rightarrow 9 p^{12} q^3 \].
04
- Combine All Simplified Parts
Combine all the simplified parts: \[ 9 \cdot p^{12} \cdot q^3 = 9 p^{12} q^3 \]. Therefore, \sqrt{81 p^{24} q^{6}}\ is equal to \9 p^{12} q^3\.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
square roots
Square roots are a fundamental concept in algebra. The square root of a number is a value that, when multiplied by itself, gives the original number. For example, the square root of 81 is 9 since \(9 \times 9 = 81\). Square roots are denoted by the symbol \(\backslashsqrt{}\). When simplifying expressions involving square roots, it's helpful to recognize perfect squares—numbers like 1, 4, 9, 16, 25, etc. Understanding how to separate and simplify parts of an expression under a square root can make the process clearer; in the given exercise, we handled the constant and the variables separately to keep things neat.
Here's a quick process to remember:
Here's a quick process to remember:
- Identify and simplify the constant inside the square root.
- Break down variables under the square root into simpler components.
- Apply the property \(\sqrt{a\cdot b} = \sqrt{a} \cdot \sqrt{b}\) to simplify things further.
exponents
Exponents represent the number of times a number, known as the base, is multiplied by itself. For example, \(p^{24}\) means that p is multiplied by itself 24 times. When dealing with square roots and exponents together, we can use the fractional exponent notation to simplify the calculations.
In simpler steps:
For instance, in the original exercise:
In simpler steps:
- Understand that \(\sqrt{x^n} = x^{n/2}\).
- Apply this rule to each term involving exponents.
- Simplify the exponents by dividing by 2.
For instance, in the original exercise:
- \texponent of \(p^{24}\) simplifies to \(p^{12}\) since \(24\div 2 = 12\).
- \texponent of \(q^{6}\) simplifies to \(q^{3}\) since \(6\div 2 = 3\).
algebraic simplification
Algebraic simplification is the process of making expressions easier to work with by reducing them to their simplest form. The given problem showcases several relevant techniques:
First, use properties of square roots and exponents to simplify each component separately.
First, use properties of square roots and exponents to simplify each component separately.
- Handle constants and variables independently.
- Use the rule \(\sqrt{a\cdot b} = \sqrt{a} \cdot \sqrt{b}\).
- Break down the expression.
- Simplify each element.
- Reassemble the simplified parts.