问题描述:
计算:(11x+y)(-11x+y)+(11x+y)的2次方
计算:1.(11x+y)(-11x+y)+(11x+y)的2次方;2.(x-2y)(x+2y)-(x+2y)的2次方-(x-2y)(2y-x)
计算:1.(11x+y)(-11x+y)+(11x+y)的2次方;2.(x-2y)(x+2y)-(x+2y)的2次方-(x-2y)(2y-x)
问题解答:
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