4a+2b+c=-1...........................1
a-b+c=-1...............................2
4a分之4ab-c平方..................3 谁能帮我解答下,写出详细的解答步骤
4a+2b+c=-1...........................1
a-b+c=-1...............................2
4a分之4ab-c平方..................3 谁能帮我解答下,写出详细的解答步骤