Question

4x + 2x + ax + 1 is exactly divisible by 2x + 1, then the value of a is

Answer 1

2x+1=0

x=-1/2

By putting value of x

4×(-1/2)+2×(-1/2)+(-1/2)×a+1=0

-4/2-2/2-1/2a+1=0

-2-1-1/2a+1=0

-2-1/2a=0

-a/2=2

a=-1

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