№1
Преобразуйте в многочлен
1)  (x+6)²      2)  (3a-1)²   3)   (3y-2)(3y+2)     4)   (4a+3k)(4a-3k)
№2
Упростите выражение (b-8)²-(64-6b)
№3
Разложите на множители
1)  25-y²     2)  a²-6ab+9b 

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