Base of a triangle is represented by (2x -6) and the height is represented by (x - 2)
given that the formula for the area of a triangle is A = 1/2 x b x h, which polynomial expression represents the area of the triangle.
A: x^2 + 5x + 6
B: x^2 - 5x + 6
C: x^2 + 5x - 6
D:2x^2 + 10x +12