#Yaii

A=-2xy+3/2xy^2+1/2xy^2+xy

=(3/2xy^2+1/2xy^2)+(-2xy+xy)

=2xy^2-xy

B=xy^z+2xy^z-xyz-3xy^2z+xy^2z

=(xy^2z+2xy^2z-3xy^2z+xy^2z)-xyz

=xy^2z-xyz

C=4x^2y^3+x^4-2x^2+6x^4-x^2y^3

=(x^4+6x^4)+(4x^2y^3-x^2y^3)-2x^2

=7x^4+3x^2y^3-2x^2

$$\text{#Minzz}$$

Thu gọn đa thức :

A = -2xy + 3/2xy^2 + 1/2xy^2 + xy

A = (-2xy + xy) + (3/2xy^2 + 1/2xy^2)

A =  -xy + 2xy^2

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B = xy^2z + 2xy^2z - xyz - 3xy^2z + xy^2z

B = (xy^2z + 2xy^2z  - 3xy^2z + xy^2z) - xyz

B = xy^2z - xyz

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C = 4x^2y^3 + x^4 - 2x^2 + 6x^4 - x^2^3

C = (4x^2y^3 - x^2^3) + (x^4 + 6x^4) - 2x^2 

C =  3x^2y^3 + 7x^4 - 2x^2