Hi

Multiply.

(a-1/2)(a+2/3)

Using FOIL method:

F	First terms  a^2

O	Outside terms  (2/3)a

I	Inside terms   (-1/2)a

L	Last terms     (-1/2)(2/3) or -2/6 = -1/3

Note: (2/3)a + (-1/2)a = (4/6)a + (-3/6)a = (1/6)a

 (a-1/2)(a+2/3) = a^2 + (1/6)a - 1/3 

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