（1）3x127
经典解法20题
（2）9x224x1611
3x3x68
42x23x0
56x25x500选学）
6x24x40（选学）
7（x2）24（2x3）2
（8）y22√2y40
（9）（x1）23（x120（10）x22ax3a20（a为常数）
1
f112x2＋7x＝4．12x2－1＝2x（13）x26x5014x2－4x30
157x2－4x－3016x2－6x9017x8x16918x51619xx2x3x1206x2x20
2
f1x29x802x26x2703x22x8004x210x20005x220x9606x223x7607x225x15408x212x10809x24x252010x211x102011x215x54012x211x18013x29x20014x219x90015x225x156016x222x57017x25x176018x226x133019x210x11020x23x304021x213x1400
海量111题
3
f22x213x48023x25x176024x228x171025x214x45026x29x136027x215x76028x223x126029x29x70030x21x56031x27x60032x210x39033x219x34034x26x160035x26x55036x27x144037x220x51038x29x14039x229x208040x219x20041x213x48042x210x24043x228x1800
4
f44x28x209045x223x90046x27x6047x216x28048x25x50049x213x14050x223x102051x25x176052x28x20053x216x39054x232x240055x234x288056x222x105057x219x20058x27x6059x24x221060x26x91061x28x12062x27x120063x218x17064x27x170065x26x80
5
f66x213x12067x224x119068x211x42069x20x289070x213x30071x224x140072x24x60073x227x170074x227x152075x22x99076x212x11077x217x70078x220x19079x22x168080x213x30081x210x119082x216x17083x21x20084x22x288085x220x64086x222x105087x213x120
6
f88x24x285089x226x133090x217x16091x23x4092x214x48093x212x133094x25x4095x26x91096x23x4097x213x12098x27x44099x26x70100x29x900101x217x720102x213x140103x29x360104x29x900105x214x130106x216x630107x215x440108x22x1680109x26x2160
7
f110x26x550111x218x320
8
f答案
（1）3x127解：3x127∴3x127∴3x1±√7注意不要丢解∴x±√713（2）9x224x1611解：9x224x1611∴3x4211∴3x4±√11∴x±√1143∴原方程的解为x1√1143x2√11433x3x68解：x3x68化简整理得x23x100方程左边为二次三项式，右边为零x5x20方程左边分解因式∴x50或x20转化成两个一元一次方程∴x15x22是原方程的解。42x23x0解：2x23x0x2x30用提公因式法将方程左边分解因式∴x0或2xr