а) (5⁶)³×125/(5⁷)³ = 5¹⁸×5³/5²¹ = 5²¹/5²¹=1
б) 65²+39²-52²-26²/49²-2×49×36+36²= (65-52)(65+52)+(39-26)(39+26)/169 = 1521+845/169 = 2366/169=14
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а) (5⁶)³×125/(5⁷)³ = 5¹⁸×5³/5²¹ = 5²¹/5²¹=1
б) 65²+39²-52²-26²/49²-2×49×36+36²= (65-52)(65+52)+(39-26)(39+26)/169 = 1521+845/169 = 2366/169=14