Answer:
x²-x-12
using foil method
Step-by-step explanation:
1.
Use the FOIL method: (a+b)(c+d)=ac+ad+bc+bd(a+b)(c+d)=ac+ad+bc+bd.
{x}^{2}+3x-4x-12x2+3x−4x−12
2.
Collect like terms.
{x}^{2}+(3x-4x)-12x2+(3x−4x)−12
3.
Simplify.
{x}^{2}-x-12x2−x−12
