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第1题:人教版数学八年级下册,第十六章《分式》第2节《分式的运算》中的例3:“丰收1号”小麦的试验田是边长为a米的正方形减去一个边长为1米的正方形蓄水池后余下的部分,“丰收2号”小麦的试验田是边长为(a-1)米的正方
The first question: PEP mathematics eighth grade, the sixteenth chapter “Fractional” Section 2 “Fractional Operations” in Example 3: “Harvest 1 ” wheat test field is a side length of a The square of the meter minus the remaining part of a square cistern with a side length of 1 meter, the experimental field of “Feng Shou No.2” wheat is a square with a side length of (a-1)