3x²=64/3 x²=64/9 x=±8/3
5(x+1)²=49/5 (x+1)²=49/25 x=±7/5-1 x=2/5或-12/5
3(x-1)²=64/9 (x-1)²=64/27 x=±8根号3/9+1