Answer
$12km^2\left( m-2k^{2}+3km^{2}-5k^{3}m \right)$
Work Step by Step
$\bf{\text{Solution Outline:}}$
Get the $GCF$ of the given expression, $
12km^3-24k^3m^2+36k^2m^4-60k^4m^3
.$ Divide the given expression and the $GCF.$ Express the answer as the product of the $GCF$ and the resulting quotient.
$\bf{\text{Solution Details:}}$
The $GCF$ of the constants $(
12,-24,36,60
)$ is $
12
.$ The $GCF$ of the common variable/s is the variable/s with the lowest exponent. Hence, the $GCF$ of the common variables $(
km^3,k^3m^2,k^2m^4,k^4m^3
)$ is $
km^2
.$ Hence, the entire expression has $GCF=
12km^2
.$
Factoring the $GCF=
12km^2
,$ the given expression is equivalent to
\begin{array}{l}\require{cancel}
12km^2\left( \dfrac{12km^3}{12km^2}-\dfrac{24k^3m^2}{12km^2}+\dfrac{36k^2m^4}{12km^2}-\dfrac{60k^4m^3}{12km^2} \right)
.\end{array}
Using the Quotient Rule of the laws of exponents which states that $\dfrac{x^m}{x^n}=x^{m-n},$ the expression above simplifies to
\begin{array}{l}\require{cancel}
12km^2\left( k^{1-1}m^{3-2}-2k^{3-1}m^{2-2}+3k^{2-1}m^{4-2}-5k^{4-1}m^{3-2} \right)
\\\\=
12km^2\left( k^{0}m^{1}-2k^{2}m^{0}+3k^{1}m^{2}-5k^{3}m^{1} \right)
\\\\=
12km^2\left( (1)m-2k^{2}(1)+3km^{2}-5k^{3}m \right)
\\\\=
12km^2\left( m-2k^{2}+3km^{2}-5k^{3}m \right)
.\end{array}