2х²у-2х²*3у²= 2х²у-6х²у²= -4у
1/16 ÷ 1/81 + - 1/8
To find: multiplicative inverse
1
1/16 ÷ 1/81 + -1/8
1/16 ÷ 1/81 = 81/16
+ - 1/8 = - 1/8
81/16 - 1/8
= 81/16 - 2/16
= (81 - 2)/16
= 16/79
2х²у-2х²*3у²= 2х²у-6х²у²= -4у
1/16 ÷ 1/81 + - 1/8
To find: multiplicative inverse
1
1/16 ÷ 1/81 + -1/8
1/16 ÷ 1/81 = 81/16
+ - 1/8 = - 1/8
81/16 - 1/8
= 81/16 - 2/16
= (81 - 2)/16
= 16/79