How do i factor this?

1331x^9 + 343y^6

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- Sep 18th 2008, 02:30 PMjarr3dHow do i factor this?
How do i factor this?

1331x^9 + 343y^6 - Sep 18th 2008, 02:43 PMPlato
Sum of cubes?

$\displaystyle \left( {11x^3 + 7y^2 } \right)\left( {121x^6 - 77x^3 y^2 + 49y^4 } \right)$ - Sep 18th 2008, 02:44 PMskeeter
sum of two cubes factors as shown ...

$\displaystyle a^3 + b^3 = (a+b)(a^2 - ab + b^2)$

now note that ...

$\displaystyle 1331x^9 + 343y^6 = (11x^3)^3 + (7y^2)^3$ - Sep 18th 2008, 02:45 PMjarr3d
Can you show how its done?

- Sep 18th 2008, 02:45 PMjarr3d
ok