Question

Verify that -1,-3 and 5 are the zeroes of the cubic polynomial p(x)=x3-x2-17x-15 and then verify the relationship between the zeroes and the coefficients

Answer 1

Step-by-step explanation:

(-1)3 -(-1)2 -17(-1) -15= -1-1+17-15=17-17=0

(-3)3 -(-3)2 -17(-3) -15= -27-9+51-15=51-51=0

(5)3-(5)2-17(5)-15= 125-25-85-15=125-125=0