Four mark exericse problems II — task. Mathematics State Board, Class 8.

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Factorise the following expressions using \((a - b)^3 = a^3 - 3a^2b + 3ab^2 - b^3\) identity.

1. \(y^3 - 18y^2 + 108y - 216 =\)

\((3x - 4)^3\)
\((3x + 4)^3\)
\((4x + 3)^3\)
\((4x - 3)^3\)

2. \(8m^3 - 60m^2n + 150mn^2 - 125n^3 =\)

\((3p + 2q)^3\)
\((2p + 3q)^3\)
\((2p - 3q)^3\)
\((3p - 2q)^3\)

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