Answer:
The value at x =3 is undefined for the given expression
Step-by-step explanation:
Given expression is 
To find for what value of x is undefined in the given expression :



If we put x=3 in the above expression we get



Therefore 
The value at x =3 is undefined for the given expression
Answer:
48 minutes
Step-by-step explanation:

144÷3=48
is the factored form of given polynomial 
<em><u>Solution:</u></em>
Given that we have to factor the given polynomial
Factoring: Finding what to multiply together to get an expression. It is like "splitting" an expression into a multiplication of simpler expressions.
<em>Factoring a polynomial involves writing it as a product of two or more polynomials</em>
Given polynomial is: 
Step 1 :
We can use factoring by grouping
Group
with 3xy and −12y with 9x then factor each group.

Taking -y as common term from first two terms and -3 as common term from last two terms

Now taking (4y - 3x) as common term

So the given polynomial is factored