For what value of kkk does the equation x2−(k+2)x+(k+1)=0x^2 - (k+2)x + (k+1) = 0x2−(k+2)x+(k+1)=0 have exactly one real solution?
k=0k = 0k=0
k=−2k = -2k=−2
k=1k = 1k=1
k=2k = 2k=2