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数与式１．计算９３ｘ－７１２ｘ＋２６·３８ｘ＝．２．－１３的倒数是．３．（－６）２＝．４．２０００用科学记数法表示为．５．ａ的３倍与ｂ的一半的和用代数式表示为．６．分解因式ａ２－２ａｂ＋ｂ２－ｃ２＝．７．配上适当的数，使等式ｘ２－ｘ＋１＝（ｘ－）２＋成立
Number and type 1. Calculate 93x-712x + 26 · 38x =. 2. The inverse of -13 is. 3. (-6) 2 =. 4.2000 expressed in scientific notation as. 5. The sum of a 3 times a and b half is algebraically expressed as. 6. Decomposition factor a2-2ab + b2-c2 =. 7. With the appropriate number, the equation x2-x + 1 = (x-) 2+ holds