Diketahui: F(x)=x²+5x-4 g(x)=x+7.tentukan:(f•g)(x) dan (g•f)(x)

langsung aja yy

A.
(fog)(x) = f{g(x)}

= g(x)² + 5g(x) - 4

= (x+7)² + 5(x+7) - 4

= x² + 14x + 49 + 5x + 35 - 4

= x² + 19x + 80

B.
(gof)(x) = g{f(x)}

= f(x) + 7

= x² +5x - 4 + 7

= x² + 5x + 3

semoga berguna +_+

F(x)=x²+5x-4
g(x)=x+7

(f•g)(x) = f(g(x))
= f(x+7)
=(x+7)²+5(x+7)-4
=x²+14x+49+5x+35-4
=x²+14x+5x+49+35-4
=x²+19x+80

(g•f)(x) = g(f(x))
= g(x²+5x-4)
= (x²+5x-4)+7
=x²+5x-4+7
=x²+5x+3