Question

12. If (x + 5)(x + p) = x^2 + 2x +k, then
A) p = 3 and k =5
C) p = 3 and k - 15
E) p = -3 and k - 15
B) p = -3 and k = 15
D) p = 3 and k = 15​

Answer 1

Step-by-step explanation:

expand the bracket & compare the coefficients

x² + x(5+p) + 5p = x² + 2x + k

5 + p = 2 ( on comparing coefficients of x)

p = –3

k = 5p = ‐15