Factorize each of the following algebraic expression:

Question:

Factorize each of the following algebraic expression:
16 − a6 + 4a3b3 − 4b6

Solution:

$16-a^{6}+4 a^{3} b^{3}-4 b^{6}$

$=16-\left(a^{6}-4 a^{3} b^{3}+4 b^{6}\right)$

$=4^{2}-\left[\left(a^{3}\right)^{2}-2 \times a^{3} \times 2 b^{3}+\left(2 b^{3}\right)^{2}\right]$

$=4^{2}-\left(a^{3}-2 b^{3}\right)^{2}$

$=\left[4-\left(a^{3}-2 b^{3}\right)\right]\left[4+\left(a^{3}-2 b^{3}\right)\right]$

$=\left(4-a^{3}+2 b^{3}\right)\left(4+a^{3}-2 b^{3}\right)$

$=\left(a^{3}-2 b^{3}+4\right)\left(-a^{3}+2 b^{3}+4\right)$

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