x^3+2x^2-10x-20
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x^3+2x^2-10x-20x^3+2x^2-10x-20x^3+2x^2-10x-20x^3+2x^2-10x-20=x^2(x+2)-10(x+2)=(x+2)(x^2-10)=x^2(x+2)
x^3+2x^2-10x-20
x^3+2x^2-10x-20
x^3+2x^2-10x-20
x^3+2x^2-10x-20
=x^2(x+2) -10(x+2)
=(x+2)(x^2-10)
=x^2(x+2)-10(x+2)
=(x+2)(x^2-10)
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x)
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(x-1)/(x+3x+2)+6/(2+x-x)-(10-x)/(4-x)
matlab解决约束非线性规划问题myfun.mfunction f=myfun(x)f=x(1)*x(13)+x(2)*x(14)+x(3)*x(15)+x(25)+1.697*(x(4)*x(16)+...x(5)*x(17)+x(6)*x(18)+x(26))+0.575*(x(7)*x(19)+x(8)*x(20)...+x(9)*x(21)+x(27))+0.723*(x(10)*x(22)+x(11)*x(23)+x(12)*x(24));
matlab解决约束非线性规划问题myfun.mfunction f=myfun(x)f=x(1)*x(13)+x(2)*x(14)+x(3)*x(15)+x(25)+1.697*(x(4)*x(16)+...x(5)*x(17)+x(6)*x(18)+x(26))+0.575*(x(7)*x(19)+x(8)*x(20)...+x(9)*x(21)+x(27))+0.723*(x(10)*x(22)+x(11)*x(23)+x(12)*x(24));
通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20
X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4)
(X-2)(X+3)+3x+10
x(x-2)(x-3)
{x|(x+3)(x-2)
-x^3+x^2-x
(X-X*20%-18-(X-X*20%-18)*10%=X*1/2-3(过程)
x×x+3x-9/ x+2
x+2x+3x+.+100x
解不等式:(10x^2+20x+18)/(x+1)^3>x^3+5x
(x*x-3)*(x*x-3)-x*(x*x-3)-2x*x 因式分解