1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)
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1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(
1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)
1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)
1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)
1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)
1/(5X+4)-1/(6X-5)=1/(4X+5)-1/(5X+4)
2/(5X+4)=1/(4X+5)+1/(6X-5)
2/(5X+4)=(6X-5+4X+5)/(4X+5)(6X-5)
2/(5X+4)=10X/(4X+5)(6X-5)
10X(5X+4)=2(4X+5)(6X-5)
50X^2+40X=48X^2+20X-50
X^2+10X+25=0
(X+5)^2=0
X=-5 检验 把x=-5代进元方程是它的解
所以元方程的解X=-5
1/(5x+4)-1/(6x-5)=1/(4x+5)-1/(5x+4)
2/(5x+4)=1/(6x-5)+1/(4x+5)
2/(5x+4)=10x/(6x-5)(4x+5)
2(6x-5)(4x+5)=10x(5x+4)
24x^2+10x-25=25x^2+20x
x^2+10x+25=0
(x+5)^2=0
x=-5
1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2}
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2/x+1+3/x-1=6/x²-1 4-x/x-4+1/4-x=1 不等组5x-2>3(x+1)x-2大于等于18-x 化简计算(x²/x-3-9/x-3)÷1/x²+3x (x=1/3)
先化简,再求值:(1)(x+1/x²-x-x/x²-2x+1)÷1/x,x=根号2+1 (2)(1+x-3/x+3)÷2x/x²-9 x=根号3+3 (3)4-x/x-2÷(x+2-12/x-2)x=根号3-4 (4)x-3/2x-4÷(5/x-2-x-2) x=根号3-2
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先化简再求值:(x²+2x-8/x³+2x²+x)÷{(x-2/x)·(x+4/x+1)}其中x=-4/5其中x=-4/5
1).1/x²-3x+2 + 1/x²-5x+6 + 1/x²-4x+32).x-1/x²+3x+2 + 6/2+x-x² -(10-x)/4-x²3).(x+1-1/1-x)÷(x-x²/x-1)4).(x²-4/x²-x-6 +x+2/x-3)÷(x+1)/(x-3)5).x/x-y ·y²/x+y - x^4y/x^4-y^4
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