Difference of the squares (powers) — task. Mathematics CBSE, Class 7.

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Factor the difference of the squares

z^{6} - u^{20}

.

Choose the correct answer:

$(z^{6} - u^{20}) \cdot (z^{6} + u^{20})$
$z^{6} + {2 z^{3} u^{10} + u}^{20}$
$z^{6} - {2 z^{3} u^{10} + u}^{20}$
$(z^{3} - u^{10}) \cdot (z^{3} + u^{10})$

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