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Question
Factorize each of the following expression:
a4b4 − 16c4
Solution
\[a^4 b^4 - 16 c^4 \]
\[ = [( a^2 b^2 )^2 - (4 c^2 )^2 ]\]
\[ = ( a^2 b^2 + 4 c^2 )( a^2 b^2 - 4 c^2 )\]
\[ = ( a^2 b^2 + 4 c^2 )[(ab )^2 - (2c )^2 ]\]
\[ = ( a^2 b^2 + 4 c^2 )(ab + 2c)(ab - 2c)\]
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