Question

If (2x+1) be a factor of polynomial p(x)=kx^3+23x^2+71x+30 then find k hence factorise the polynomial k

Answer 1

Answer:

k=20

Step-by-step explanation:

2x+1=0

2x=-1

x=-1/2

put x = -1/2

k(-1/2)cube+23(-1/2) square+71(-1/2)+30=0

-k/8+5.75-35.5+30=0

-k/8+0.25=0

-k/8+20/8=0

take 8 common

-k+20=0×8

-k=0-20

-k=-20

cut minus from minus

k=20

hope it helps and please mark it as a brainliest answer please its a request!!!!!!