Задание 157

Упростите выражения:
a) (11 27)(11 + 27);
б) (4 19 )2;
в) (2 5 )2 + 1 2(5 1)2;
г) (2 7)2 + 411 47.

Answers

a)

(11 27)(11 + 27) = (11)2 (27)2 = 11 4 7 = 11 28 = 17


б)

(4 19)2 = |4 19| = 19 4


в)

(2 5)2+1 2(51)2 = |25|+1 2(525+1) = 52+1 2(625) = 52+35 = 1


г)

(2 7)2 + 411 47 = 4 47 + 7 + 47 228 + 4 = 11 47 + 4(7 2)2 = 11 47 + 4|7 2| = 11 47 + 47 8 = 3
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2021-08-08 00:00
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