(x-1/x²+6x+9)÷(x²-1/x+3)=(x+1/2)
问题描述:
(x-1/x²+6x+9)÷(x²-1/x+3)=(x+1/2)
答
(x-1/x²+6x+9)÷(x²-1/x+3)=(x+1/2)化简
(x-1)/(x+3)²÷(x-1)*(x+1)/(x+3)=(x+1/2)
1/(x+1)(x+3)=(x+1/2)
你是(x+0.5)还是(x+1)/2?(x+1)/21/(x+1)(x+3)=(x+1)/2(x+1)^2*(x+3)-2=0x^3+5X^2*+7x+1=0(x+1)(X^2*+6x+1)=0-----------x+1=0解得:x=-1 或X^2*+6x+1=0解得:X=-3±√2