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Algebraic Identities

Factorise the...

Question

Factorise the following expression-
$I^{2} - 16 I + 64$

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Solution

$I^{2} - 16 I + 64$
$= I^{2} - 8 I - 8 I + 64$
$= I (I - 8) - 8 (I - 8)$
$= (I - 8) (I - 8)$

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