Question

Question no.
27 28 29 20

Answer 1

x=-4,3,7 is zeros of x^3-6x^2-19x+84
f(-4)=-64-96+76+84=-160+160=0
f(3)=27-54-57+84=111-111=0
f(7)=343-294-133+84=427-427=0

is your answer