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【简答题】
因式分解： （1）3a（x-y）+9（y-x）； （2）y 3 -4y 2 +4y； （3）（x 2 +1） 2 -4x 2 ．
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皮皮学刷刷变学霸
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A.
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B.
错误
【简答题】Fill in the blanks with the words given below. Change the form where necessary. ually highlight afford genuily realize unique fellows grateful local shed 1 Do you_______ th...
【单选题】Imagine you have won a prize for mathematics and are required to give a speech to English majors, which topic is best for the occasion?
A.
The mathematic problems you have encountered in the research.
B.
The efforts you have made during the whole process and how you face the challenges.
C.
The importance of mathematics to our life.
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