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Factorise the following by any method.\left. \begin{array} { l l } { a ^ { 2 } b ^ { 3 } c ^ { 3 } - a b c ^ { 2 } } & { b ) 49 a ^ { 2 } b ^ { 4 } - 7 a b c } \\ { 16 a ^ { 2 } - 144 b ^ { 2 } } & { \text { d) } 64 a ^ { 2 } - 64 a + 16 } \end{array} \right. |
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Answer» abc^2(ab^2c-1)7ab(7ab^3-c)(4a+12b)(4a-12b)=16(a+3b)(a-3b)16(4a^2-4a+1)=16(2a-1)^2 |
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