x-11x+31x-21

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x-11x+31x-21x-11x+31x-21x-11x+31x-21x^3-11x^2+31x-21=x^3-x^2-10x^2+10x+21x-21=x^2(x-1)-10x(x-1)+21(x

x-11x+31x-21
x-11x+31x-21

x-11x+31x-21
x^3-11x^2+31x-21
=x^3-x^2-10x^2+10x+21x-21
=x^2(x-1)-10x(x-1)+21(x-1)
=(x-1)(x^2-10x+21)
=(x-1)(x-3)(x-7)

matlab中a=[x(11)/x,x(12)/x;x(21)/x,x(22)/x;x(31)/x,x(32)/x;x(41)/x,x(42)/x;x(51)/x,x(52)/x]咋错了 x-11x+31x-21 X^3-11X^2+31X-21过程详细求因式分解,x^3-11x^2+31x-21 x^3-11x^2+31x-21 分解因式 x-11x+31x-21 因式分解：x³-11x²+31x-21 因式分解：x³-11x²+31x-21 分解因式：x³-11x²+31x-21 x^3-11x^2+31x-21 用matlab求解一个优化问题（目标函数非线性,约束函数线性）min f(x)=12*x(1)+21*x(2)+21*x(3)+13*x(4)+20*x(5)+23*x(6)+15*x(7)+17*x(8)+27*x(9)+17*x(10)+19*x(11)+31*x(12)+200*[(x(1)+x(2)+x(3))^0.6+(x(4)+x(5)+x(6))^0.6+(x(7)+x(8)+x(9)) x/2x*2-11x-21=x+7/x*2-12x+35 x x X x x x