已知根号(2X-Y)的平方=3,三次根号(X-2Y)的立方= --3,求(X+2Y)(X-Y)的值.(有2种答案)
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已知根号(2X-Y)的平方=3,三次根号(X-2Y)的立方= --3,求(X+2Y)(X-Y)的值.(有2种答案)
已知根号(2X-Y)的平方=3,三次根号(X-2Y)的立方= --3,求(X+2Y)(X-Y)的值.(有2种答案)
已知根号(2X-Y)的平方=3,三次根号(X-2Y)的立方= --3,求(X+2Y)(X-Y)的值.(有2种答案)
X=3,Y=3,(X+2Y)(X-Y)=0 或者X=-1,Y=1,(X+2Y)(X-Y)=-2