Алгебра. 7 класс
№1
а) 5·7¹²-5⋮30
б) 7·3¹¹+7⋮28
№2
(8m-3)(8m+3) - (4m+3) (16m-3) при m= -10 - 1,5
№1
а) 5·7¹²-5⋮30
б) 7·3¹¹+7⋮28
№2
(8m-3)(8m+3) - (4m+3) (16m-3) при m= -10 - 1,5
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Answers & Comments
(64m²+24m-24m)-(64m²-12m+48m-9) = 64m²-64m²+12m-48m+9 = 9-36m
при m=-10
9-36m = 9-36•(-10) = 9+360 = 369
при m = -1,5
9-36m = 9-36•(-1,5) = 9+54 = 63