\(=3x^4+3x^2y^2+2x^2y^2+2y^4+2y^2\)
\(=\left(3x^2+2y^2\right)\left(x^2+y^2\right)+2y^2\)
\(=3x^2+2y^2+2y^2\)
\(=3x^2+4y^2\)
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tinh gia tri cua cac bieu thuc sau:
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