Today If 2 p - q = -11, p.q = -5, find the value of 8³-q³
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Answer:
I think the question will be 8p^3-q^3 please confirm
Step-by-step explanation:
8p^3-q^3
=(2p)^3-(q)^3 {a^3-b^3=(a-b)^3+3ab(a-b)}
=(2p-q)^3+3.2p.q(2p-q)
=(-11)^3+3.2.(-5)×(-11)
=-1331+330
=-1001
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