Factorise:(x - 3y)3 + (3y - 7z + (7z - x)3 from Mathematics Po
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    Polynomials

    Multiple Choice QuestionsShort Answer Type

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    155.

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    157. Find the value of x3 - 8y3 - 36xy - 216 when x = 2y + 6.
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    158.

    Factorise:
    (x - 3y)3 + (3y - 7z + (7z - x)3

    We have
    (x - 3y) + (3y - 7z) + (7z - x) = 0
    ∴ (x - 3y)3 + (3y - 7z)3 + (7z - x)3
    = 3(x - 3y) (3y - 7z) (7z - x)

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    160. If p = 2 - a, then prove that a3 + 6ap + p3 - 8 = 0.
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