Answer:
The correct answer is "9√2 units".
Step-by-step explanation:
The given equations are:
⇒  ...(equation 1)
...(equation 1)
⇒  ...(equation 2)
...(equation 2)
According to the 2nd equation, we get
⇒ 
⇒              
On substituting the value of "y" in the 1st equation, we get
⇒  
      
      
      
On taking common, we get
      
On applying factorization, we get
      
    
            
                         
                               
or,
                          
                                 
Now,
The points are:
(-7, 12) = (x₁, y₁)
(2, 3) = (x₂, y₂)
By using the distance formula, the length of chord will be:
= 
On substituting the values in the above formula, we get
= 
= 
= 
=  units
 units
 
        
             
        
        
        
I think your answer is 78 = x -2