Question

If x =-1/2 is a zero polynomials, p(x)=8x^3-kx^2-x+2,find k

Answer 1

Hey!!!..here is ur answer

p (x)=8x^3-kx^2-x+2

put x= -1/2

8 (-1/2)^3-k (-1/2)^2-(-1/2)+2=0

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

k/4=3/2

k=6

Hope it will help you