cepat tolong dijawab smuanya secepat cepatnya hari INI dikumpul?

2. log 45
= log (9×5)
= log (3×3×5)
= log 3 + log 3 + log 5
= 0.4771 + 0.4771 + 0.6990
= 1.6532
3. a) 8 (a+1) = 3a + 4
8a + 8 = 3a + 4
8a - 3a = 4 - 8
5a = -4
a = -4/5
b) 3 (2x + 1) = -3 (2x + 5)
6x + 3 = -6x - 5
6x + 6x = -5 - 3
12x = -18
x = -18/12
x = -3/2
semoga membantu