Question

find the value of k if x-1 is factor of the polynomial 2x²+(k+1)x+5​

Answer 1

Answer:

k=-6

Step-by-step explanation:

x-1 =0

x=1

$2x^{2} +(k+1)x+5$

$2(1)^{2} +(k+1)(1)+5 =0\\2(1)+k+1+5=0\\2+k+1+5=0\\2+k+1=0-5\\2+k+1=-5\\k+1=-5-2\\k+1=-7\\k=-7+1\\k=-6$