Hi

(y+2)(y-6) is same as y^2-4y-12   |Note use of ^ for squared term (^ is uppercase 6 on Your keyboard)

Note:SUM of the inner product(2y) and the outer product(-6y) = -4y

OR:

  (y+2)(y-6)

 y(y-6) + 2(y-6)

 y^2 - 6y + 2y -12

 y^2 -4y - 12 

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