Square root of a number is 2 numbers that multiply to get 4 that are the same
first find the factors
4=2 times 2
then find the doubles and write only one from each pair
√4=2
so if you had a number like 36 then 
36=2 times 2 times 3 times 3
the doubles are 2 and 3 so 
√36=2 times 3=6
square root of 4 can be 2 or -2
        
                    
             
        
        
        
B) -15.6,-12.9,-10.2,-7.5,-4.8
This is an arithmetic sequence. 
        
                    
             
        
        
        
Answer:
just search up Mathaway in your browser you will get your answer and a step by step explanation!
Step-by-step explanation:
 
        
             
        
        
        
The product of 4xy and y² + 2x can also be written as
4xy(y² + 2x)
When we have brackets like this, we multiply whatever is left of the brackets by everything inside.
1) 4xy multiplied by y²
    4xy x y² = 4xy³
2) 4xy multiplied by 2x
    4xy x 2x = 8x²y
3) Add together 4xy³ and 8x²y 
    4xy³ + 8x²y
        
             
        
        
        
Answer:
It would be the third one hope i helped
Step-by-step explanation: