Answer:
12^2 + 15^2 = 18^2
Step-by-step explanation:
If we have 3 sides of a triangle we can use the Pythagorean theorem to determine if the triangle is a right triangle
a^2 + b^2 = c^2
12^2 + 15^2 = 18^2
If this is true, then the triangle is a right triangle
 
        
             
        
        
        
Answer: 
x=9,-1  and 
Explanation:
we have been given with the quadratic equation 
we compare the given quadratic equation with general quadratic equation 
general quadratic is 
from given quadratic equation a=1,b= -8,c= -9
substituting these values in the formula for discriminant 

Now, to find the value of x 
Formula is 
Now, substituting the values we will get 

And rewritting the given equation by  shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of 

 
        
                    
             
        
        
        
11/7
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