Question

Find the value of k if x= -1 is the solution if 3x^2 -(k+1)x + 7 =0

Answer 1

p+-1)=3(-1)^2-(k+1)(-1)+7
3-(-k-1)+7
3+k+1+7
k+11
k=-11

Answer 2

hey friend your answer
3 (-1)^2-(k+1)-1+7=0
(3×1)+k+1+7=0
3+1+7=-k
11=-k
k=-11 ans