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[" 2.If "x=3" and "y=-1," find the value...

[" 2.If "x=3" and "y=-1," find the values of each of the following using in identity: "],[[" (i) "(9y^(2)-4x^(2))(81y^(4)+36x^(2)y^(2)+16x^(4)),,," (iidentity): "]]

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