-多項(xiàng)式練習(xí)題

1、多項(xiàng)式練習(xí)多項(xiàng)式練習(xí)11.多項(xiàng)式是______次______項(xiàng)式，最高次項(xiàng)是223431723xyxyxy?????____________________________________.2.如果，那么的值是____________________.2|3|(24)0yx????2xy?3.去括號(hào)：=_________________________.(32)xyz????4.當(dāng)時(shí)，=_________________.3a??22(

2、24)(51)aaaa?????5.代數(shù)式與的差是__________________________.2965xx??21027xx??6.若使多項(xiàng)式與多項(xiàng)式相加后不含二次項(xiàng)，則32281xxx???323253xmxx???m=_____________.7.=__________________________.3()4(2)aabab?????8.已知代數(shù)式，當(dāng)時(shí)，它的值為7，則當(dāng)時(shí)，它的值為_(kāi)________.33mxnx??

3、3x?3x??多項(xiàng)式練習(xí)多項(xiàng)式練習(xí)21.如果與是同類(lèi)項(xiàng)，那么n=___________，m=_______________.1235mnyx?623xy?2.若是關(guān)于的6次單項(xiàng)式，則k=_______________________.|2|3(5)kkxy??xy3.減去等于的多項(xiàng)式為_(kāi)______________________.3x?2535xx??4.若，則的值為_(kāi)_______________________.23mn???52

4、4mn???5.三個(gè)連續(xù)偶數(shù)的和是120，則最大的偶數(shù)為_(kāi)____________________.6.，則的值為_(kāi)______________.22|3|3(1)0xy????20092yx???????7.已知，則22Axxyy???22Bxyx???(1)AB=__________________________(2)3A4B=_______________________________.多項(xiàng)式練習(xí)多項(xiàng)式練習(xí)31.將代數(shù)式中是單

5、項(xiàng)式的是2322431111205372222aamnxyaxmnykx???????_____________________________，是多項(xiàng)式的是_____________________________.2.多項(xiàng)式是關(guān)于的三次二項(xiàng)式，則m=_______，n=_________.32(1)nmaa????a3.已知表示的數(shù)在數(shù)軸上如圖，那么=___________ab||2||abab????0ba__________5a

6、b減去等于()。22baba??6.將2(xy)3(xy)4(xy)5(xy)3(xy)合并同類(lèi)項(xiàng)得()7已知xy=3，則72x2y的值為；8一個(gè)多項(xiàng)式加上3x2x2得到x21，那么這個(gè)多項(xiàng)式為；9已知與是同類(lèi)項(xiàng)，則5m3n的值是31323mxy?52114nxy??10.若長(zhǎng)方形的長(zhǎng)為2a＋3b，寬為a＋b，則其周長(zhǎng)是（）A.6a＋8bB.12a＋16bC.3a＋8bD.6a＋4b多項(xiàng)式練習(xí)多項(xiàng)式練習(xí)61.指出下列各式中哪些是單項(xiàng)式，

7、哪些是多項(xiàng)式，哪些是整式？2222211210612537abxyxxymnxxxxx???????單項(xiàng)式：_____________________________多項(xiàng)式：_____________________________整式：________________________________2.已知單項(xiàng)式632211037axyxy????與的次數(shù)相同，則a=___________.3.若(k5)x|k2|y3是關(guān)于x、y的6

8、次單項(xiàng)式，則k的值是__________.4.如果多項(xiàng)式2221mabx????是一個(gè)四次三項(xiàng)式，那么m=_________.5.如果2xn(m1)x1是關(guān)于x的三次二項(xiàng)式，則n=_____m=______.6.當(dāng)b=________時(shí)，式子2aab5的值與a無(wú)關(guān).7、化簡(jiǎn)下列各式(1)(2x4―5x2―4x1)―(3x3―5x2―3x)；(2)―[―(―x)]―(x―1)；21(3)―3(x2―2xyy2)(2x2―xy―2y2)。2