Question

Factorise 7a^3+56b^3

Answer 1

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Answer 2

Hey !!! ^_^

Here is your answer

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$7 {a}^{3} + 56 {b}^{3} \\ \\ let \: 7 \: be \ \:common \\ 7( {a}^{3} + 8 {b}^{3}) \\ \\ use \: the \: formula \: \\ {a}^{3} + {b}^{3} = (a + b)( {a}^{2} - ab + {b}^{2} ) \\ \\ 7( {a} + 2b)( {a}^{2} - 2ab + 4 {b}^{2})$

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