Question

Factorise the following 7acube+56bcube

Answer 1

Answer:

7 (a+2b) (a^2+4b^2-2ab)

Step-by-step explanation:

7a^3+56b^3

= 7(a^3+8b^3)

=7{(a) ^3+(2b) ^3}

=7(a+2b) {(a) ^2+(2b) ^2-(a) (2b) }

=7(a+2b) (a^2+4b^2-2ab)

Answer 2

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