1)9(x-3)平方=4(x-2)平方
9(x-3)²-4(x-2)²=0
[3(x-3)+2(x-2)][3(x-3)-2(x-2)]=0
(5x-13)(x-5)=0
x=13/5 x=5
(2)(x-1)平方-4(1-x)+4=0
(x-1)²+4(x-1)+4=0
[(x-1)+2]²=0
(x+1)²=0
x=-1
x(2x+1)=3+6x
x(2x+1)-3(2x+1)=0
(2x+1)(x-3)=0
x=-1/2 x=3
1)9(x-3)平方=4(x-2)平方
9(x-3)²-4(x-2)²=0
[3(x-3)+2(x-2)][3(x-3)-2(x-2)]=0
(5x-13)(x-5)=0
x=13/5 x=5
(2)(x-1)平方-4(1-x)+4=0
(x-1)²+4(x-1)+4=0
[(x-1)+2]²=0
(x+1)²=0
x=-1
x(2x+1)=3+6x
x(2x+1)-3(2x+1)=0
(2x+1)(x-3)=0
x=-1/2 x=3