Y⁴ + 12y² + 36
Now factorize the expression
y⁴ + 6y² + 6y² + 36
= y²(y² + 6) + 6(y² + 6)
= (y² + 6) (y² + 6)
<span>Now 6 is not the perfect square and according to rule, binomial can not be factored as the difference of two perfect squares.
</span>so multiply both.
(y² + 6)² is the answer.
        
                    
             
        
        
        
28, by the way you could’ve just used a calculator
        
                    
             
        
        
        
It is C..........................Happy Birthday
 
        
             
        
        
        
Step-by-step explanation:
2(x+10)=60
x+10=60/2
x=30-10=20