Toán Lớp 8: Tim min : E=2x^2+8xy+11y^2-4x-2y+6
F=2x^2+6y^2+5z^2-6xy+8yz-2xz+2y+4z+2
G=2x^2+2y^2+z^2+2xy-2xz-2yz-2x-4y
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Toán Lớp 8: Tim min : E=2x^2+8xy+11y^2-4x-2y+6
F=2x^2+6y^2+5z^2-6xy+8yz-2xz+2y+4z+2
G=2x^2+2y^2+z^2+2xy-2xz-2yz-2x-4y
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