(x + 1)(x - 1)
I dont understand this could any1 help me
       
      
                
     
    
    
    
    
    2 answers:
            
              
              
                
                
Step-by-step explanation:
It's a factored form of the quadratic equation
  
 
in the form of  
 
in which a = 1, b = 0, c = 1.
 
                                
             
                    
              
              
                
                
Answer:
x^2-1
Step-by-step explanation:
you must use the distributive property
first you do x•x=x^2, 
then you do x•1 and x•-1 to get x and -x and those cancel out,
the you do 1•-1=-1, then you put it together to get x^2-1
 
                                
             
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Answer:
3 beause when you dividend it -5.6+4(3) .
 
        
             
        
        
        
I’m not sure but this seems right 
Y=6.25X
        
             
        
        
        
        
She still has to complete 18 problems!
        
             
        
        
        
18 kg times 5 kg would be 90 kg because each window was 18 kg, hence 90 kg