Diketahui fungsi f(x)=x^2-10x+24.Jika f(a)=8,maka nilai a=

F(a)=a^2-10a+24
8=a^2-10a+24
0=a^2-10a+16
0=(a-2)(a-8)
  a-2=0   a-8=0
  a=2      a=8