Diket: f(x)=x²-4,, g(x)=x+3 Ditanya; 1). (f°g)..? 2). (g°f)..? Tolong bantuin kak

Question

Matematika Diposting : 2018-01-16 Diupdate : 2018-01-31 Mila123456789

Pertanyaan

Diket: f(x)=x²-4,, g(x)=x+3

Ditanya; 1). (f°g)..?
2). (g°f)..?

Tolong bantuin kak

Answer 1

(fog)(x)
= (x + 3)² - 4
= x² + 6x + 9 - 4
= x² + 6x + 5

(gof)(x)
= x² - 4 + 3
= x² - 1