①被除式首项2x³÷除式首项x²=2x……启谨……商式首项,② ﹙2x﹚×丨﹙x²-2x+3﹚=2x³-4x²+6x,③﹙2x³+3x²-x+2﹚-﹙2x³-4x²+6x﹚=7x²-7x+2,④7x²÷x²=7……………………………………商式第二项,⑤7×﹙氏袭x²-2x+3﹚=歼旁兄7x²-14x+21,⑥﹙7x²-7x+2﹚-﹙7x²-14x+21﹚=7x-19……余式。商:q(x)=2 x+7,余式:r(x﹚=7x﹣19
商=2x+7余式=7x-19