Chapter 0: Problem 10
Simplify each expression. Leave answers with exponents. $$\left(-4 m^{3} n^{9}\right)^{2}$$
Short Answer
Expert verified
16m^6n^{18}
Step by step solution
01
Apply the Power of a Power Rule
When an expression with exponents is raised to another power, use the rule \((a^m)^n = a^{m \cdot n}\). In this case, apply the rule to each factor inside the parentheses: \[ (-4 m^3 n^9)^2 = (-4)^2 (m^3)^2 (n^9)^2 \]
02
Simplify Each Factor
Now simplify each part of the expression from Step 1:- For \((-4)^2\), calculate the power: \((-4)^2 = 16\).- For \((m^3)^2\), multiply the exponents: \(m^{3 \cdot 2} = m^6\).- For \((n^9)^2\), multiply the exponents: \(n^{9 \cdot 2} = n^{18}\).
03
Combine the Simplified Parts
Combine all the simplified parts together to get the final expression:\[ 16 m^6 n^{18} \] This is the simplified form of the original expression.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Power of a Power Rule
The "Power of a Power Rule" is a fantastic tool for dealing with exponents. Imagine having a mathematical expression where you not only have a base raised to a power but that whole expression is again raised to another power. It might look complicated at a glance, but this rule comes to the rescue.
Here's how it works: If you have something like \((a^m)^n\), you can simply multiply the exponents together to get \(a^{m \cdot n}\). This is because the operation essentially repeats the multiplication of the base by itself multiple times, equivalent to the product of the exponents.
Here's how it works: If you have something like \((a^m)^n\), you can simply multiply the exponents together to get \(a^{m \cdot n}\). This is because the operation essentially repeats the multiplication of the base by itself multiple times, equivalent to the product of the exponents.
- Example: \((m^3)^2 = m^{3 \cdot 2} = m^6\)
- This means you'll multiply the number of times the base is used as a factor.
Simplifying Expressions
Simplifying expressions in algebra involves reducing them to a simpler or more concise form without changing their value. This is where we put those rules of exponents to good use!
By applying the rules, such as the "Power of a Power Rule," we handle each part of the expression step by step. For instance, when you encounter \((-4 m^3 n^9)^2\), you take each component:
By applying the rules, such as the "Power of a Power Rule," we handle each part of the expression step by step. For instance, when you encounter \((-4 m^3 n^9)^2\), you take each component:
- For \((-4)^2\), compute the power, which results in 16 because multiplying negative numbers gives a positive result when the exponent is even.
- For \((m^3)^2\), multiply the exponents to get \(m^6\).
- Similarly, for \((n^9)^2\), multiply the exponents to get \(n^{18}\).
Algebraic Expressions
Algebraic expressions are like puzzles waiting to be solved! These expressions include numbers, variables, and operation symbols. They can be as simple as \(2x + 3\) or more complex like \((-4 m^3 n^9)^2\). Understanding how to manipulate these expressions is key to solving algebra problems effortlessly.
Algebraic expressions can be simplified using several rules:
Algebraic expressions can be simplified using several rules:
- Combine like terms - terms that have the same variable raised to the same power.
- Use exponent rules - these help simplify expressions with powers.
- Factor or distribute - helps in both breaking down and building up expressions.