Factor: $x^2+7x+12$

Factor: $2x^2+11x+15$

Factor: $x^2+16x+55$

Factor:$x^2+17x+72$

Factor: $9x^2+15x+6$

Factor: $x^2+9x+18$

Factor: $8x^2+16x+8$

Factor: $x^2+12x+27$

Factor: $9x^2+48x+60$

Factor: $9x^2+43x+28$