4(x-1)²=9（3x+2）²
(2x-2)²=（9x+6）²
（9x+6）²-(2x-2)²=0
(9x+6+2x-2)(9x+6-2x+2)=0
(11x+4)(7x+8)=0
11x+4=0或7x+8=0
x=-4/11或x=-8/7