Question

(ii) 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:

2 is a zero of x

2

+3x+k.

Thus, (2)

2

+3(2)+k=0

k+10=0

k=−10