Question

What is value of k 3 is a zeros of a polynomial 2x2+ x+k

Answer 1

Hi !

p(x) = 2x² + x + k

given ,
p(3) = 0

x = 3

p(3) = 2 × 3² + 3 + k

18 + 3 + k = 0

21 + k = 0

k = -21

value of k is -21

Answer 2

Hi
3 is a zeroes of a polynomial
p (x) = 2x² + x - k
p(3) = 2 × 3² + 3 + k
18 + 3 + k = 0
21 + k = 0
k = -21