The quadratic expression x 2 + 5 x + n x 2 +5x+nx, start superscript, 2, end superscript, plus, 5, x, plus, n can be factored as ( x + a ) ( x + b ) (x+a)(x+b)left parenthesis, x, plus, a, right parenthesis, left parenthesis, x, plus, b, right parenthesis, where n nn, a aa, and b bb are integers. will wrote that n nn could be equal to − 3 −3minus, 3. charlotte wrote that n nn could be equal to 2 1 2121. which student is correct ?