(Fatec) A sentença verdadeira para quaisquer números a e b reais é:

a) (a - b)3 = a3 - b3
b) (a + b)2 = a2 + b2
c) (a + b) (a - b) = a2 + b2
d) (a - b) (a2 + ab + b2) = a3 - b3
e) a3 - 3a2b + 3ab2 - b3 = (a + b)3​
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