Evaluate the expression when x = -1 and y = 4. 9x^-5y^-2y
a) 9/64
b) 9/16
c) -9/64
d) -9/16

The correct option is D) -9/16

Therefore the final expression when X is equal to -1 and Y is equal to 4 is

Step-by-step explanation:

Given:

Evaluate when x = -1 and y = 4

Solution:

When x = -1 and y = 4 we hane

Identity we have

As we know  minus sign multiplied by odd number of times the number is multiplied and the assign remain same that is minus. Therefore,

Now using the above identity we get

Therefore the final expression when X is equal to -1 and Y is equal to 4 is

i believe the correct answer is b.