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Penjelasan dengan langkah-langkah:

6] x² – 6x – 3 = 0

a = 1

b = -6

c = -3

1/x1 + 1/x2

= (x1 + x2)/(x1 . x2)

= (-b/a) / (c/a)

= -b/c

= – (-6/-3)

= -2

7] 2x² – 4x + 3 = 0

p = 2

q = -4

r = 3

a/b + b/a

= (a . a + b . b)/(a . b)

= (a² + b²)/(ab)

= ((a + b)² – 2ab)/(ab)

= ((- (-q/p))² – 2 . r/p) / (r/p)

= ((- (4/2))² – 2 . 3/2) / (3/2)

= (4 – 3) . 2/3

= 2/3

Detail Jawaban

Kelas 9

Mapel 2 – Matematika

Bab 9 – Persamaan Kuadrat

Kode Kategorisasi : 9.2.9