Sabe-se que a-b=4 e a^2+ab+b^2=52, então: a)a^2-b^2=208 c)a^3+b^3=208 e)a^3-b^3
b)a^2+b^2+208 d)a^3-b^3+208
b)a^2+b^2+208 d)a^3-b^3+208
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