x2-x-6=0 সমীকরণের মূলদ্বয় হবে-
A
3,2
B
3,-2
C
-3,2
D
-3,-2
Correct Answer: 3,-2
x² - x - 6 = 0 = > x² - 3x + 2x - 6 = 0 = > x(x - 3) + 2(x - 3) = 0 = > (x - 3) (x + 2) = 0 ∴ x - 3 = 0 = > x = 3 অথবা, x + 2 = 0 ∴⁰x = - 2