Question

Alguém me ajude a fazer a 2) letra C

Answer 1

(1/5 - 1/2)^(-2) - [ -2/3 × (1/2 - 1/5)] =

(2/10 - 5/10)^(-2) - [ -2/3 × (5/10 - 2/10)] =

(-3/10)^(-2) - [ -2/3 × 3/10 ] =

(-10/3)^2 - [ -6/30 ] =

100/9 + 6/30 =

1000/90 + 18/90 =

1018/90