9 units²
is the correct answer!
Area of a triangle formula: A = [tex]\frac{1}{2}[/tex] bh
The area of the triangle above the x-axis:
2 x 3 = 6
6 ÷ 2 = 3
The area of the triangle below the x-axis:
2 x 6 = 12
12 ÷ 2 = 6
3 + 6 = 9
Please let me know if I am wrong.