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What large cubes you have!

Algebra Level 2

\[ 999^3 - 123^3 - 876^3 \]

is equal to:

\[ 999^2 + 123 ^2 + 876 ^ 2 \] \[ 999 \times 123 \times 876 \] \[ 999 + 123 + 876 \] \[ 3 \times 999 \times 123 \times 876 \]

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Excel in math and science

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It's hard to learn from lectures and videos

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by Chung Kevin

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