Объяснение:
5)3²*3=3^(2+1)=3³=27
6)n²*n³:n=n^(2+3-1)=n⁴
8)(ab)³=(a)³*(b)³=a³b³
9)(a²)³*a⁵=a^(2*3+5)=a¹¹
10)3⁸*7⁸/21⁷=(3*7)⁸/21⁷=21⁸/21⁷=21¹=21
11)(x²-y²)/(x-y)=(x-y)*(x+y)/(x-y) = x+y = 5+3=8
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Verified answer
Объяснение:
5)3²*3=3^(2+1)=3³=27
6)n²*n³:n=n^(2+3-1)=n⁴
8)(ab)³=(a)³*(b)³=a³b³
9)(a²)³*a⁵=a^(2*3+5)=a¹¹
10)3⁸*7⁸/21⁷=(3*7)⁸/21⁷=21⁸/21⁷=21¹=21
11)(x²-y²)/(x-y)=(x-y)*(x+y)/(x-y) = x+y = 5+3=8