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Fungsi

f(a)= 6

objek =a
imej =6

6 = (a² + 2) / ( a + 3)
6( a + 3 ) = a² + 2
6a + 18 = a² + 2
a² - 6a - 16 = 0
( a - 8) ( a + 2 ) = 0
a = 8 , a = -2

Apabila a > 0

Maka , a = 8 (B)

Kelas 10 Matematika
Bab Persamaan Kuadrat

f(a) = 6
(a² + 2) / (a + 3) = 6
a² + 2 = 6 (a + 3)
a² + 2 = 6a + 18
a² - 6a + 2 - 18 = 0
a² - 6a - 16 = 0
(a - 8) (a + 2) = 0
a + 2 = 0
a = -2

a - 8 = 0
a = 8

a > 0, maka  a = 8