3 ms·Don't you mean: x^2+2x+1 = (x+1)^2; If x=-1, then (x+1)^2 + 5 = 5by philbarr 12y agoDon't you mean: x^2+2x+1 = (x+1)^2; If x=-1, then (x+1)^2 + 5 = 5