1) упростите выражение 5(3a - 4b) - 1/4(8a - 16b) 2)докажите тождество 5(2b - 8) -4 (6b - 12) -5 =-14b + 3. Created by romanovg85. matematika-ru

Ответ:13а-16bПошаговое объяснение:5(3a-4b) - 1/4(8a - 16b) = 5(3a-4b) - 1/4 × 4(2a-4b) = 15a-20b -(2a-4b) = 15a-20b-2a+4b = 13a-16b5(2b-8) -4(6b-12)-5 = -14b+3 10b-40-24b+48-5 = -14b+3 -14b+3 = -14b+3

4(8a - 16b) 2)докажите тождество 5(2b - 8) -4 (6b

romanovg85 @romanovg85

July 2022 1 6 Report

1) упростите выражение 5(3a - 4b) - 1/4(8a - 16b)
2)докажите тождество 5(2b - 8) -4 (6b - 12) -5 =-14b + 3

Answers & Comments

Hellin122

Ответ:

13а-16b

Пошаговое объяснение:

5(3a-4b) - 1/4(8a - 16b) = 5(3a-4b) - 1/4 × 4(2a-4b) = 15a-20b -(2a-4b) = 15a-20b-2a+4b = 13a-16b
5(2b-8) -4(6b-12)-5 = -14b+3

10b-40-24b+48-5 = -14b+3

-14b+3 = -14b+3

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