(x 1)

1
??????????(?)
2
???
????,??????15???,??????12???,???????1?,???
????4?,???????????????????????????????

3
??
???????????x???,?????________ ?, ???????_________
?, ???________?,???? ???____________
(x1)

(x4)
4
????????????x???,????,?
??????2,????????????????60,????????
5
????????????x???,????,?
???,? 4(x1)5(x4)60
???,? 4x45x2060
??,????? 9x36
???????9,? x4
??????4?,???????
6
????
????,?
4(x-10)3(x-6)
???,? 4x-403x-18
? ?,? 4x-3x-1840
??,? x22
7
????????????????
1????
2????
3?? ?
4???????? axb(a?0)
5????????a ?,x
8
???
1????????????????,???
P118
2??????
P118 2
9
1???P120 8 (1) (2) 2??????P47-P48
P119 4?5?6? 8 (3) (4) 9