Question

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Answer 1

$x {}^{3} + 1$

$= x {}^{3} + 1 {}^{3}$

we know that

$x {}^{3} + y {}^{3 } = (x + y)(x {}^{2} + y {}^{2} - xy)$

then ,

$x {}^{3} + 1 {}^{3} = (x + 1)(x {}^{2} + 1 - x)$

I hope it help you ❤️

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