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(3x-5y)(4x+2y)=====


Răspuns :

[tex](3x-5y)(4x+2y)=12x^2+6xy-20xy-10y^2=12x^2-14xy-10y^2[/tex]
= 12x^2+6xy-20xy-10y^2=12x^2=14xy-10y^2