-(x1)2+2(x1)-(-(x2)2+2(x2))怎么化简成(x1-x2)(2-x1-x2)
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-(x1)2+2(x1)-(-(x2)2+2(x2))怎么化简成(x1-x2)(2-x1-x2)
-(x1)2+2(x1)-(-(x2)2+2(x2))怎么化简成(x1-x2)(2-x1-x2)
-(x1)2+2(x1)-(-(x2)2+2(x2))怎么化简成(x1-x2)(2-x1-x2)
(x1+x2+...+xn)^2
(x1-x2)2 化简
min=2*x1+3*x2; x1+x2>=350; x1>=100; 2*x1+x2
1,x1,x2...Xn,成等比数列,x1 x2..xn>0,x1*x2*...xn=?x1,x2...Xn,2成等比数列,x1 x2..xn>0,x1*x2*...xn=?
疑难数学问题火急求助x1^3-3x1^2+2x1+x2→x1(x1^2-2x1+2-x1)+x2→x1(3-x1)+x2 (怎么算出3-X1的)→3x1-x1^2+x2=2x1-x^2+x1+x2=-(x^2-2x1)+x1+x2=-1+2=1
-(x1)2+2(x1)-(-(x2)2+2(x2))怎么化简成(x1-x2)(2-x1-x2)
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