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" 21."4x^(2)-9y^(2)-2x-3y...

" 21."4x^(2)-9y^(2)-2x-3y

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Factorize following experssions (i) x^(4)-y^(4)" (ii)"9a^(2)-(2x-y)^(2)" (iii)"4x^(2)-9y^(2)-6x-9y

Factorize following experssions (i) x^(4)-y^(4)" (ii)"9a^(2)-(2x-y)^(2)" (iii)"4x^(2)-9y^(2)-6x-9y

Factorise : 4x^2-9y^2-2x-3y

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