Question

hi i have 3 questions and i really need ur help cuz i am new here
1)Simplify and write the answer in exponential form [4^-1 - 3 ^-1 + 6^-2] ^-1
2) Evaluate using identities (7 – 2m) (7 + 2m)
3) Subtract the sum of xy(−x − y −1) and 2(xy-x^2 y) from 4x(xy- x^2y + xy^2)
urgent plss

Answer 1

Step-by-step explanation:

1) [ 4^-1-3^-1+6^-2]^-1

= [1/4-1/3+1/6^2]^-1

= take LCM of 4,3,36, we get 36

= [(9-12+1)/36]^-1

= [-1/18]^-1

= -18