Question

If 2x+1 is a factor of of the polynomial x³ - ax + 2 then find a​

Answer 1

Answer:

15/4

Step-by-step explanation:

given 2x+1 =0

so, x= -(1/2)

now putting this value in the given polynomial equation:

P(x)= x^3-ax+2

P(x)=0

then

(-1/2)^3 - a(-1/2) +2 =0

-1/8 +a/2 +2 =0

(-1+16)/8 = - a/2

15/8=a/2

a=(15×2)/8

a=15/4 answer