Answer:
C
Step-by-step explanation:
In this technique, if we have to factorise an expression like ax2+bx+c, we need to think of 2 numbers such that:
N1⋅N2=a⋅c=1⋅−12=−12
AND
N1+N2=b=−1
After trying out a few numbers we get N1=3 and N2=−4
3⋅−4=−12, and 3+(−4)=−1
x2−x−12=x2−4x+3x−12
x(x−4)+3(x−4)=0
(x+3)(x−4)=0
Now we equate the factors to zero.
x+3=0,x=−3
x−4=0,x=4
 
        
             
        
        
        
Answer:
C. 12
Step-by-step explanation:
Remember 0 to 4 turn it back
5 or above give it a shove.
Since 12.444 is around 0 to 4.
We can round that to 12.
 
        
                    
             
        
        
        
The answer is Option B 
Step-by-step explanation:
Step 1: Group the given cubic polynomial into two sections.  
So  polynomial can be  grouped as

Step 2:Find what's the common in each section.
In section  the come term is
  the come term is 
In section (8x + 48)  the come term is 8
Step 3:Factor the commonalities out of the two terms.
Factoring out  from the first section
 from the first section   , we get
, we get  
Factoring out 8 from the second section(8x + 48) ,  we will get 8(x + 6).
Step 4: Combine the factors together for terms contains the same factor, 
Combining we get,

 
        
             
        
        
        
Answer: 2/4=1/2
Step-by-step explanation: 4-2=2. 7-3=4