if one of the zero of p(x)=3x^3-x^2-ax-45 is 3 then find a. Created by serenabinoj.

if one of the zero of p(x)=3x^3-x^2-ax-45 is 3 then find a

January 2023 1 1 Report

if one of the zero of p(x)=3x^3-x^2-ax-45 is 3 then find a

Answer:

a = 9

Step-by-step explanation:

As 3 is a zero of p(x), p(3) must be equal to 0

=> 3(3)³-(3)²-3a-45 = 0

=> 81-9-3a-45 = 0

=> -3a = -27

=> a = 9