1.

If x-2 is factor of x2 - 3ax - 2a, then a = A. 2 B. -2 C. 1 D. -1

Answer»

Let f(x) = x2 - 3ax - 2a

Since, x-2 is a factor of f(x) 

so,

f (2) = 0

22+ 3 a (2) - 2a = 0

4 + 6a -2a = 0

a = -1



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