(-2x²)*(-xy)+(-2x²)*3y²упростите

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