(2/3y - 3/2x)^2 +2xy
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(2/3y-3/2x)^2+2xy
=4y^2/9+9x^2/4-2.2/3y.3/2x+2xy
=4y^2/9+9x^2/4-2xy+2xy
=4y^2/9+9x^2/4
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