29. If x-3 is a factor of x2 - ax -15.
then a = ?*
O(a) -2
O (b) 5
O (c)-5
O (d) 3
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Answered by
5
Answer:
ANSWER
Let P(x)=x
2
+3ax−2a
Given, (x−2) is a factor of P(x)
x−2=0
x=2
∴P(2)=0
⇒2
2
+3a(2)−2a=0
⇒4+4a=0
⇒a=−1
Option D is correct.
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