Question

Sy kurang ngerti.
mohon bantuannya.

Answer 1

Pakai rumus determinan
misal :
a = 3x - 1
b = 3
c = x + 1
d = x + 2

rumus determinan = ad - bc
0 = (3x - 1)(x + 2) - (3)(x + 2)
0 = 3x^2 + 6x - x - 2 - 3x - 2
0 = 3x^2 + 2x - 4

bentuk umum persamaan kuadrat :
ax^2 + bx + c = 0
3x^2 + 2x - 4 = 0

a = 3
b = 2
c = -4

hasil kali akar-akar = c/a
= -4/3 (d)

^2 = kuadrat

maaf kalau salah
semoga membantu