已知(x+1)*(x+1)=-Iy-1I,求2(xy-(5xy)*(5xy))-3((xy)*(xy)-xy)
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已知(x+1)*(x+1)=-Iy-1I,求2(xy-(5xy)*(5xy))-3((xy)*(xy)-xy)
已知(x+1)*(x+1)=-Iy-1I,求2(xy-(5xy)*(5xy))-3((xy)*(xy)-xy)
已知(x+1)*(x+1)=-Iy-1I,求2(xy-(5xy)*(5xy))-3((xy)*(xy)-xy)
因为(x+1)*(x+1)≥0,-/y-1/≥0
又因为/y-1/≥0,-/y-1/≤0
所以(x+1)*(x+1)=-/y-1/=0
则x=-1,y=1,xy=-1
2(xy-(5xy)*(5xy))-3((xy)*(xy)-xy)=2(-1-25)-3(1+1)=-58
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