Question 621046
(y - 10)^2

(y - 10)(y - 10)

Multiply using the FOIL Method:

y * y = y^2

y * -10 = -10y

-10 * y = -10y

-10 * -10 = 100

y^2 - 10y - 10y + 100

Combine like terms:

-10y - 10y = -20y

The Answer:

y^2 - 20y + 100