Answer:
you know you really need to watch what you say that comes out of your mouth
Answer:

Step-by-step explanation:
Evaluating the numerator and denominator before evaluating
Using the rule of exponents
⇔
,
= 1
Thus
y² ← substitute values into expression
=
× 4² =
× 16 = 
and denominator

= 1 × 4³ = 1 × 64 = 64
Now dividing
÷ 64
=
×
( cancel 16 and 64 )
=
= 
Root of ( 20^2 - 16^2 ) = 12
Answer:
AB = -10
Im confused is this what you wanted?