a) (3х + 6у) (1/9х - 2/3у) = 3х 1/9х + 3х (-2/3у) + 6у 1/9х + 6у (-2/3у)= 1/3 + (-2ху) + 2/3у + (-4у^2)= 1/3 - 2ху + 2/3у - 4у^2
б) (м(в^3) - 5/6n) (3 - 1,2n) = м(в^3)3 + м(в^3)(-1.2n) - 5/6n3 - 5/6n(-1,2n)= 3мв^3 - 3,6мв^3 - 15/6n + 6/5n^2= 3мв^3 - 3,6мв^3 - 2,5n + 6/5n^2
a) (3х + 6у) (1/9х - 2/3у) = 3х 1/9х + 3х (-2/3у) + 6у 1/9х + 6у (-2/3у)
= 1/3 + (-2ху) + 2/3у + (-4у^2)
= 1/3 - 2ху + 2/3у - 4у^2
б) (м(в^3) - 5/6n) (3 - 1,2n) = м(в^3)3 + м(в^3)(-1.2n) - 5/6n3 - 5/6n(-1,2n)
= 3мв^3 - 3,6мв^3 - 15/6n + 6/5n^2
= 3мв^3 - 3,6мв^3 - 2,5n + 6/5n^2