Q. 113.7( 3 Votes )

If x+2 is a factor of x2+mx+14, then m =
A. 7

B. 2

C. 9

D. 14

Answer :

f (x) = x2 + mx + 14

Since, (x +2) is a factor of f (x), so


f (-2) =0


(-2)2 + m (-2) + 14 = 0


18 - 2m = 0


m = 9

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