*代表平方
(3a+2)*=(4b+6)*
9a*+12a+4=16b*+48b+36
16b*+48b-9a*-12a+32=0
16b*+48b+20-9a*-12a+12=0
(2b+5)(8b+4)+(-3a-6)(3a-2)=0
所以.b=-5/2或-1/2
a=-2或2/3