Jika f(x)=x2+x-12 dan g(x)=x+4 ,maka nilai (f+g)(1) adalah

f(x) = x² + x – 12

g(x) = x + 4

(f + g)(x)

= f(x) + g(x)

= x² + x – 12 + x + 4

= x² + 2x – 8

(f + g)(1)

= 1² + 2(1) – 8

= 1 + 2 – 8

= -5