Question
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due \( 81 a^{3} b^{5} c^{5}+27 b^{3} c \)

Ask by Riley Cross. in Sierra Leone
Mar 10,2025

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Answer

The expression factors to \(27b^3c(3a^3b^2c^4 + 1)\).

Solution

1. Identify the greatest common factor (GCF) of the two terms: - The numerical coefficients are \(81\) and \(27\). Their GCF is \(27\). - For the variable \(b\): the powers are \(b^5\) and \(b^3\). The smallest power is \(b^3\). - For the variable \(c\): the powers are \(c^5\) and \(c\). The smallest power is \(c\). - The variable \(a\) appears only in the first term, so it is not common. 2. Factor out the GCF \(27 b^3 c\) from the expression: \[ 81a^3b^5c^5 + 27b^3c = 27b^3c \left(\frac{81a^3b^5c^5}{27b^3c} + \frac{27b^3c}{27b^3c}\right) \] 3. Simplify each term inside the parentheses: - For the first term: \[ \frac{81a^3b^5c^5}{27b^3c} = \frac{81}{27} \cdot a^3 \cdot b^{5-3} \cdot c^{5-1} = 3a^3b^2c^4 \] - For the second term: \[ \frac{27b^3c}{27b^3c} = 1 \] 4. Write the final factored expression: \[ 27b^3c \left(3a^3b^2c^4 + 1\right) \]

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Mind Expander

Did you know that the expression \( 81 a^{3} b^{5} c^{5}+27 b^{3} c \) can be factored using the sum of cubes technique? Since both terms have a common factor, you can factor out \( 9bc \) first. This gets you \( 9bc(9a^3b^4c^4 + 3b^2) \). Then, if you observe \( 9a^3b^4c^4 + 3b^2 \), it can be transformed further if needed, but the primary step is recognizing the common factor! In the real world, factoring polynomials like this has tons of applications, especially in physics and engineering. For example, when dealing with equations of motion or optimizing certain conditions in a project, being able to simplify and manipulate expressions can make your calculations smoother and more efficient. It’s all about making the math work for you!

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