If a = B, then the following formula does not hold: A & # 178; + B & # 178; = A & # 178; B & # 178; a & # 178; = B & # 178; AC = BC, a-c = c-b

If a = B, then the following formula does not hold: A & # 178; + B & # 178; = A & # 178; B & # 178; a & # 178; = B & # 178; AC = BC, a-c = c-b

A & # 178; + B & # 178; = A & # 178; B & # 178; and a-c = c-b
This kind of topic can completely regard B as a, so for a & # 178; + B & # 178; = A & # 178; B & # 178; there is 2A * 2 = a ^ 4, which is obviously not tenable, because the topic only gives a = B this condition, similarly we can see that a-c = C-B is also wrong
Learn to make full use of the conditions given by the topic and simplify the problem as much as possible. This is my advice to you