№2
а)7*7*7*7=
б)-x*(-x)*(-x)= но можно записать и . Разницы в данном случае нет.
№3
а)
б)
№4
№5
№6
№7
7x-(-(14x+28))=7(3x+4)
7x-(-14x-28)=7(3x+4)
21x+28=21x+28
№8
№9
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Answers & Comments
№2
а)7*7*7*7=
б)-x*(-x)*(-x)=
но можно записать и
. Разницы в данном случае нет.
№3
а)
б)
№4
а)
б)
№5
а)
б)
№6
а)
б)
№7
7x-(-(14x+28))=7(3x+4)
7x-(-14x-28)=7(3x+4)
21x+28=21x+28
№8
а)
б)
№9
а)
б)