а) (3а – 2в)2 = (3а – 2в)(3а – 2в) = 3а 3а - 2в 3а - 2в 3а + 2в 2в= 9а^2 - 6ав - 6ав + 4в^2= 9а^2 - 12ав + 4в^2
б) (5а – 4в)(4в + 5а) = 5а 4в + 5а 5а - 4в 4в - 4в 5а= 20ав + 25а^2 - 16в^2 - 20ав= 25а^2 - 16в^2
в) (6а^2 + 3в^3)2 = (6а^2 + 3в^3)(6а^2 + 3в^3)= 6а^2 6а^2 + 6а^2 3в^3 + 3в^3 6а^2 + 3в^3 3в^3= 36a^4 + 18a^2v^3 + 18a^2v^3 + 9v^6= 36a^4 + 36a^2v^3 + 9v^6
а) (3а – 2в)2 = (3а – 2в)(3а – 2в) = 3а 3а - 2в 3а - 2в 3а + 2в 2в
= 9а^2 - 6ав - 6ав + 4в^2
= 9а^2 - 12ав + 4в^2
б) (5а – 4в)(4в + 5а) = 5а 4в + 5а 5а - 4в 4в - 4в 5а
= 20ав + 25а^2 - 16в^2 - 20ав
= 25а^2 - 16в^2
в) (6а^2 + 3в^3)2 = (6а^2 + 3в^3)(6а^2 + 3в^3)
= 6а^2 6а^2 + 6а^2 3в^3 + 3в^3 6а^2 + 3в^3 3в^3
= 36a^4 + 18a^2v^3 + 18a^2v^3 + 9v^6
= 36a^4 + 36a^2v^3 + 9v^6