Question

$factorise \: a {}^{7} - ab {}^{6}$
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Answer 1

Answer:

${a}^{7} - {ab}^{6}$

$a( {a}^{6} - {b}^{6} )$

$a( {a}^{3} - {b}^{3} )( {a}^{3} + {b}^{3} )$

$a( {a}^{3} + {b}^{3} ) \: (a - b)( {a}^{2} + ab + {b}^{2} )$

hope it helps you mate