1.2（X+3）^2-49=0
2.3（5-X)^2=36
3.X^2-2X=4
4.4X^2+12X-7=0
5.X^2+8X-2=0
6.X^2-X-1=0
7.2X^2-5X+1=0
8.4X^2-2X-1=0
9.X^2-2=2*根號(hào)2 （2乘以根號(hào)2)
10.根號(hào)2*(X^2-1)=X(X-2)+1
11.X^2-5X+2=0
12.(X+3)(X-5)=1
13.3分之X^2-2 +2分之X=X
14.X^2-2X-8=0
15.X(X+8)=16
16.(2X-3)^2=X^2
17.4X(X+1)=15
18.2根號(hào)3 再乘上X=根號(hào)2(X^2+1)
19.(X+2)^2= -2X
20.2分之3 乘Y（Y- 8分之3）=3Y-4
答案補(bǔ)充
(1)2x+8=16
(2)x/5=10
(3)x+7x=8
(4)9x-3x=6
(5)6x-8=4
(6)5x+x=9
(7)x-8=6x
(8)4/5x=20
(9)2x-6=12
(10)7x+7=14
(11)6x-6=0
(12)5x+6=11
(13)2x-8=10
(14)1/2x-8=4
(15)x-5/6=7
(16)3x+7=28
(17)3x-7=26
(18)9x-x=16
(19)24x+x=50
(20)6/7x-8=4