Answer:    
<u>Step-by-step explanation:</u>
To find the tangent, you need to find the derivative with respect to x.
Then substitute x = 1 into the derivative.
Given:         0 = 2x² - xy - y²
Derivative:  0 = 4x - y' - 2yy'
Solve for y': 2yy' + y' = 4x
                    y'(2y + 1) = 4x
                    

 
        
             
        
        
        
-14 and 5 (-14+5 = -9) and -14*5) = -70
Make me the brainliest answer.
        
             
        
        
        
Answer:
Take the amount spent and subtract it from the amount made to find profit/loss