Question

if x - 3 is a factor of x - ax - 15 , then the value of a is ???? (a) -2 (b) 5 (c) -5 (d) 3
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pzz tell me this answer...​

Answer 1

Step-by-step explanation:

if x - 3 is the factor

then,

x - 3 = 0

=> x = 3

so substituting x =3 in x-ax-15=0

=>3-3a-15=0

=>-3a-12=0

=>-3a=12

=>a=-4