﹙3t+2﹚²=6t+4
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﹙3t+2﹚²=6t+4
﹙3t+2﹚²=6t+4
﹙3t+2﹚²=6t+4
﹙3t+2﹚²=6t+4
9t²+12t+4=6t+4
9t²+6t=0
3t﹙3t+2﹚=0
t=0,t=-2/3
﹙3t+2﹚²-2(3t+2)=0
3t+2=0或者3t+2=2
t=-2/3 t=0