Question

Please bantuin dong, pake jalan kerjanya juga ya

Answer 1

Verified answer

Salah satu akarnya 5 => x = 5
x² + (a + 1)x + (3a + 2) = 0
5² + (a + 1)5 + (3a + 2) = 0
25 + 5a + 5 + 3a + 2 = 0
8a + 32 = 0
8a = -32
a = -4

x² + (a + 1)x + (3a + 2) = 0
x² + (-4 + 1)x + (3(-4) + 2) = 0
x² - 3x - 10 = 0
(a - 5)(a + 2) = 0
a = 5 atau a = -2
Jadi akar yang lainnya x = -2