Question

simplify this question i​

Answer 1

4^(-2)* 7^(-6) *x^6 * y^(-3)
----------------------------------------
(28)^(-4) *x^(-3) *y^6

28 ^4 * x^3 * x^6
=----------------------------------
4^2 * 7^6 * y^3 * y^6

28^4 * x^9
=-----------------------------------
4^2 * 7^2 * 7^4 * y^9

28^2 * 28^2 * x^9
=------------------------------
28^2 * 7^4 * y^9

28* 28 * x^9
= -------------------------
7*7*7*7* y^9

4^2 * x^9
= -----------------
7^2 * y^9

=> (4/7)^2 * (x/y)^9