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Factorization of a Quadratic Trinomial

Question 1viF...

Question

Question 1(vi)
Factorise the following expressions
$121 b^{2} - 88 b c + 16 c^{2}$

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Solution

$121 b^{2} - 88 b c + 16 c^{2} = (11 b)^{2} - 2 (11 b) (4 c) + (4 c)^{2} = (11 b - 4 c)^{2} [(a - b)^{2} = a^{2} - 2 a b + b^{2}]$

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