Bantu jawab kak

Jawaban:

F(x) = 3x² – 9

g(x) = 7x – 16

fog(x)

= 3x² – 9

= 7x – 16

= 3(7x-16) (7x-16) – 9

= 3(49x² – 112x – 112x + 256)- 9

= 147x² – 336x – 336x + 768 – 9

= 147x²- 672x + 759

gof (x)

= 7x – 16

= 7(3x² -9) (3x²-9)-16

= 7 (9x^4 – 27x² – 27x² + 81)-16

= 7 (9x^4 – 54x² + 81) -16

= 63x^4 – 81x² + 65

jadi gof (x) adalah 63x^4 – 81x + 65

maaf kalau salah:)