The complete factored  form of the quadratic expression is (x-8y)(x-8y)
<h3>Factorizing quadratic expression</h3>
Quadratic expressions are expressions that has a leading degree of 2
Given the expression
x^2 – 16xy + 64y^2
Factorize
x^2 - 8xy - 8xy + 64y^2
Group
(x^2 - 8xy) - (8xy + 64y^2)
x(x-8y) - 8y(x - 8y)
Since (x-8y) is common, hence;
x^2 - 8xy - 8xy + 64y^2 = (x-8y)(x-8y)
The complete factored  form of the quadratic expression is (x-8y)(x-8y)
Learn more on factoring here: brainly.com/question/65494
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Answer:

Step-by-step explanation:
we know that
If Line segment Q R is a tangent to circle P at point Q
then 
Line segment QR is perpendicular to line segment PQ (radius) and PQR is a right triangle
so
 ---> by complementary angles in a right triangle
 ---> by complementary angles in a right triangle
substitute the given value


 
        
                    
             
        
        
        
Step-by-step explanation:
4(2)-(3+2)+6, where x=2 and y=3
8-(5)+6
8-5+6
3+6
9
 
        
             
        
        
        
We will choose x=2 
Plug in x=2 as the input:
f(2)=5(2)+13
Use PEMDAS to simplify: 
f(2)=10+13
f(2)=23