已知A-2B=7a²-7ab,B=-4a²+6ab+7 (1)求A (2)若|a+1|=0,(b-已知A-2B=7a²-7ab,B=-4a²+6ab+7(1)求A(2)若|a+1|=0,(b-2²)=0,A的值
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![已知A-2B=7a²-7ab,B=-4a²+6ab+7 (1)求A (2)若|a+1|=0,(b-已知A-2B=7a²-7ab,B=-4a²+6ab+7(1)求A(2)若|a+1|=0,(b-2²)=0,A的值](/uploads/image/z/1267979-59-9.jpg?t=%E5%B7%B2%E7%9F%A5A-2B%3D7a%26%23178%3B-7ab%2CB%3D-4a%26%23178%3B%2B6ab%2B7+%281%29%E6%B1%82A+%282%29%E8%8B%A5%7Ca%2B1%7C%3D0%2C%28b-%E5%B7%B2%E7%9F%A5A-2B%3D7a%26%23178%3B-7ab%2CB%3D-4a%26%23178%3B%2B6ab%2B7%281%29%E6%B1%82A%282%29%E8%8B%A5%7Ca%2B1%7C%3D0%2C%28b-2%26%23178%3B%29%3D0%2CA%E7%9A%84%E5%80%BC)
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已知A-2B=7a²-7ab,B=-4a²+6ab+7 (1)求A (2)若|a+1|=0,(b-已知A-2B=7a²-7ab,B=-4a²+6ab+7(1)求A(2)若|a+1|=0,(b-2²)=0,A的值
已知A-2B=7a²-7ab,B=-4a²+6ab+7 (1)求A (2)若|a+1|=0,(b-
已知A-2B=7a²-7ab,B=-4a²+6ab+7
(1)求A
(2)若|a+1|=0,(b-2²)=0,A的值
已知A-2B=7a²-7ab,B=-4a²+6ab+7 (1)求A (2)若|a+1|=0,(b-已知A-2B=7a²-7ab,B=-4a²+6ab+7(1)求A(2)若|a+1|=0,(b-2²)=0,A的值