sgpwe.izt.uam.mxsgpwe.izt.uam.mx/files/users/uami/gvar/Ejer/2Mate/21ProdFact1.pdf · 45. 4x2 —{[2x2 —2x(x—3y+1)—3x2 En los problemas 46 al 81, halle el producto. se presenta
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