m2+8m+15 এর উৎপাদক কত ?
A
m+5m-3
B
m-nm+3
C
m-nm-3
D
(m+5)(m+3)
Correct Answer: (m+5)(m+3)
m2 + 8m + 15 = m2 + 5m + 3m + 15 = m(m + 5) + 3(m + 5) = (m + 5) (m + 3)