Question

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

Answer 1

Answer:

3

Step-by-step explanation:

p(x) = 3*(x*x*x) - ( x*x) - (a*x) - 45 = 0

given x = 3

put the value of x in the expression

3*3*3*3 - 3*3 - 3*a - 45 = 0

81 - 9 - 3a - 45 = 0

27 -3a = 0

27 = 3a

a = 9