求比多项式7m²-4mn-n²少2m²-mn+2n²的多项式,
问题描述:
求比多项式7m²-4mn-n²少2m²-mn+2n²的多项式,
答
(7m²-4mn-n²)-(2m²-mn+2n²)=5m²-3mn-3n²
求比多项式7m²-4mn-n²少2m²-mn+2n²的多项式,
(7m²-4mn-n²)-(2m²-mn+2n²)=5m²-3mn-3n²