1.已知(a+b-3)²-【a-b+25】=0,则a²-b²=?注,【】是绝对值.2.(a-b+c)(-a+b+c)=()²-()²
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![1.已知(a+b-3)²-【a-b+25】=0,则a²-b²=?注,【】是绝对值.2.(a-b+c)(-a+b+c)=()²-()²](/uploads/image/z/11476740-12-0.jpg?t=1.%E5%B7%B2%E7%9F%A5%28a%2Bb-3%29%26%23178%3B-%E3%80%90a-b%2B25%E3%80%91%3D0%2C%E5%88%99a%26%23178%3B-b%26%23178%3B%3D%3F%E6%B3%A8%2C%E3%80%90%E3%80%91%E6%98%AF%E7%BB%9D%E5%AF%B9%E5%80%BC.2.%28a-b%2Bc%29%28-a%2Bb%2Bc%29%3D%28%29%26%23178%3B-%28%29%26%23178%3B)
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1.已知(a+b-3)²-【a-b+25】=0,则a²-b²=?注,【】是绝对值.2.(a-b+c)(-a+b+c)=()²-()²
1.已知(a+b-3)²-【a-b+25】=0,则a²-b²=?注,【】是绝对值.2.(a-b+c)(-a+b+c)=()²-()²
1.已知(a+b-3)²-【a-b+25】=0,则a²-b²=?注,【】是绝对值.2.(a-b+c)(-a+b+c)=()²-()²