b(b+2)-b²+2a=4,求A²+2ab+b²-1的值
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b(b+2)-b²+2a=4,求A²+2ab+b²-1的值
b(b+2)-b²+2a=4,求A²+2ab+b²-1的值
b(b+2)-b²+2a=4,求A²+2ab+b²-1的值
等于3!
靠那么简单