Which is the simplified form of the expression

B. 1/(x^21y^12)

Step-by-step explanation:

First solve of x:

x^-3 / x^4 is same thing as 1/ x^3x^4 which is equal to 1/x^7

Now the cube part: (1/x^7)^3 = 1/x^21

Solve for y:

y^2 / y^6

1/ y^-2y^6 = 1/y^4

(1/y^4)^3

1/y^12

1/(x^21y^12)

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

1

step-by-step explanation:

it's the only multiple of both and the least