Question

factorise$4x {}^{2} - 4 {y}^{2} + 16x { }^{2} - 16xy$​

Answer 1

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$= > 4{x}^{2} - 4 {y}^{2} + 16 {x}^{2} - 16xy$

$= 20 {x}^{2} - 4 {y}^{2} - 16 {x}^{2} \: ans.$