Answer:
Step-by-step explanation:
(x + y)² - (x - y)² = 4xy
t = a² - b²
= (√8+2)²-(√8-2)²                    (here, x = √8 & y = 2}
=4*√8*2
=8√8
=8√2*2*2
=8*2√2
=16√2
 
        
             
        
        
        
Answer:
You "FOIL" (First, Outer, Inner, Last). 

Step-by-step explanation:
You "FOIL" (First, Outer, Inner, Last). Basically, you have to multiple each term by each of the other terms.
(3x+2)(4x-7) 
(3x)(4x) + (17)(3x) + (2)(4x) + (2)(-7)
12x^2 - 21x + 8x - 14 
12x^2 - 13x - 14
 
        
                    
             
        
        
        
Total meat in the recipe  he wants to use  = 7 pounds
Beef : pork    =    3  : 1
Total pork that he will use =       x 7 pounds
= 7/4 pounds
hope this helps