1.. Use long division to divide.
(2x2 + 10x + 12) = (x + 3)

Answer:
2(x+2)
Step-by-step explanation:
(2x²+10x+12)/(x+3)=(2(x²+5x+6))/(x+3)=(2(x²+2x+3x+6))/(x+3)=(2(x(x+3)+2(x+3)))/(x+3)=(2(x+3)+(x+2))/(x+3)=2(x+2)
i hope you understand (well it's math)