2/3; 16/19
Объяснение:
(5a - 1)(2 - a) = (a - 3)(2 - 5a)
10a - 2 - 5a² + a = 2a - 6 - 5a² + 15a
11a - 2 = 17a - 6
4 = 6a
a = 2/3
(3a + 5)(4a - 1) = (6a - 3)(2a + 7)
12a² + 20a - 3a - 5 = 12a² - 6a + 42a - 21
17a - 5 = 36a - 21
16 = 19a
a = 16/19
2/3; 16/19
Объяснение:
(5a - 1)(2 - a) = (a - 3)(2 - 5a)
10a - 2 - 5a² + a = 2a - 6 - 5a² + 15a
11a - 2 = 17a - 6
4 = 6a
a = 2/3
(3a + 5)(4a - 1) = (6a - 3)(2a + 7)
12a² + 20a - 3a - 5 = 12a² - 6a + 42a - 21
17a - 5 = 36a - 21
16 = 19a
a = 16/19