Question

. If one zero of the quadratic polynomial x² + 3x + k is 2, then the value of k is
(a) 10
(b) -10
(c) 5
(d) -5​

Answer 1

Answer:

2²+3×2+k=0

4+6+k=0

k=-10

Answer 2

Answer:

(b) -10

Step-by-step explanation:

Given quadratic polynomial = x² + 3x + k

Given zero of the polynomial = 2

Substituting this value of x in the polynomial, we get

(2)² + 3 (2) + k = 0

4 + 6 + k = 0

k = -10