(c) If a-b=-1 and ab=-12 find a^(3)-b^(3)
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Answer :
a^3 - b^3 = 35
Step-by-step explanation:
a-b = - 1
(a-b) ^3= (-1)^3
a^3 - b^3 - 3ab (a-b) = - 1
a^3 - b^3 - 3 (-12) (-1)= - 1
a^3 - b^3 - 36 = - 1
a^3 - b^3 = - 1 + 36
a^3 - b^3 = 35
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