x2 -x-2 এর একটি উৎপাদক ?
A
x + 2
B
x - 3
C
x +1
D
x -1
Correct Answer: x +1
x² - x - 2 = x² - 2x + x - 2 = x(x - 2) + 1(x - 2) = (x - 2)(x + 1)