Какое уравнение надо решить
(3m + 5)/4 = (5m + 1)/3
3(3m + 5) = 4(5m + 1)
9m + 15 = 20m + 4
9m - 20m = 4 - 15
- 11m = - 11
m = 1
A)
(a+3)² - (a-2)(2+a) = а² + 6а + 9 - а² + 4 = 6а + 13,
<span>b)
(x-7)*x + (x+3)</span>² = х² - 7х + х² + 6х + 9 = 2х² - х + 9
5 – a/3 – 3 – 2a/5 < 0
2 – a/3 – 2a/5 < 0
30 – 5a – 6a < 0
30 – 11a < 0
– 11a < – 30
a > 30/11 = a > 2 8/11
30/11 ≈ 2,72727