∴设x=a,y=3a,
∴ {2a−3a−4m=0
用配方法解方程x2-2x=2,原方程可变形为( )
①古巴比伦王国②亚历山大帝国③古罗马帝国④阿拉伯帝国
59 - 18 = 13 + 23 = 0.25+ 74 = 112 - 38 - 58 =
43 + 12 = 1- 35 = 0.875- 12 = 437 - 37 + 18 =
17 + 16 = 12 - 15 = 56 - 29 = 12 + 115 =