Question 1006790
      1) (f*g)(x), 2) (f*g)(4)
      (f*g)(x)=srt(4x-1)(x^2-10)
      (f*g)(x)=X^2(srt(4x-1)-10[srt(4x-1)]

      2) (f*g)(4)= srt[4(4)-1](4^2-10)
         (f*g)(4)= srt[16-1](16-10)
         (f*g)(4)=srt[15](6)
         (f*g)(4)=6{srt[15]}