x2+5x+6x2+bx+c(x+2)(x+3)(x+m)(x+n) \[\begin{array}{cc}{\text { b positive }} & {\text { b negative }} \\ {m, n \text { positive }} & {m, n \te...x2+5x+6x2+bx+c(x+2)(x+3)(x+m)(x+n) b positive b negative m,n positive m,n negative x2+5x+6x2−6x+8(x+2)(x+3)(x−4)(x−2) same signs same signs (x+6y)(x+6y)x2+6xy+6xy+36y2x2+12xy+36y2✓