Respuesta :

EvanDoge
1. (t-5)^2+3=t^2-10t+12+3=t^2-10t+15.

2. (a+h)^2+3=a^2+2ah+h^2+3
    (a^2)+3=a^2+3. Subtracting, we get h^2+2ah.

3. (a^2)+3=a^2+3
    (a-h)^2+3=a^2-2ah+h^2+3. Subtracting, we get 2ah-h^2.

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