a^2 - b^2 = (a - b)(a + b)

a^m*b^m = (ab)^m

16.4^4 - 15.4^4 = (16.4^2 - 15.4^2)(16.4^2 + 15.4^2) = (16.4 - 15.4)(16.4 + 15.4)(16.4^2 + 15.4^2) = 31.8(16.4^2 + 15.4^2) числитель

4.1^2*16 + 7.7^2*4 = 4.1^2*4^2 + 7.7^2*2^2 = 16.4^2 + 15.4^2 знаменатель

31.8(16.4^2 + 15.4^2) / (16.4^2 + 15.4^2) = 31.8

Verified answer

Ответ:

31,8

Объяснение:

= 72 339,4816

= 56 244,8656

72 339,4816 - 56 244, 8656 = 16 094,616

4,1² × 16 = 268,96

7,7² × 4 = 237,16

268,96 + 237,16 = 506,12

16 094,616 ÷ 506,12 = 31,8