If a - b = -7 and ab = -1 than a3-b3
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Answer:
to solve a3-b3=and;2
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Answer:
a-b=-7
take cube of both sides
(a-b)^3=-343
a^3-3a^2b+3ab^-b^3=-343
a^3-b^3-3ab(a-b)=-343
a^3-b^3=-343+3ab(a-b)=-343-3(-7)=-343+21= -322;
a^3-b^3= -322
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