Question

3. If one of the zero of the quadratic polynomial x2 + 3x + k is 2, then the value of k is
(A) 10 (B)-10 (C5 (D)-5​

Answer 1

Answer:

p( X) = x2 + 3x + k

p (2) = (2) × 2 + 3 × (2) + k

0 = 4 + 6 + k

0 = 10 + k

k = -10