Question

factorise each of the following. 1331 a cube + 1728 b cube

Answer 1

hey the answer is .....

1331a^3 + 1728b^3

= (11a )^3 + (12b)^3

= (11 a + 12b )^3


hope it helps uu frnd

Answer 2

since, a^3+b^3=(a+b)(a^2-ab+b^2)
therefore, (11a)^3+(12b)^3=(11a+12b)(121a^2-11a×12b+144b^2)
hope it helps you