80/14x2 X 100％ = 35％是怎么算出来的

80/14x2 X 100％ = 35％是怎么算出来的

14/80x2x100%
=7/40x2x100%
=7/20x100%
=7x5/(20x5)
=35%

你确定吗？？？什么确定啊？这是书上写的 怎么算出来我怀疑你看错题了 你在确定一下

x2+（14-x）2=100 80/14x2 X 100％ = 35％是怎么算出来的 2( x2 +1/x2) - 9( x + 1/x) + 14 = (100-X)X2-8=X 5(x2-x)=3(x2+x) 7/x2+x+1/x2-x=6/x2-1 4X2-4X+1=0X2-12X+35=0X2-2X-35=0 (14+x)x2=42怎么解 x2-2x=80解题过程 x2-x+14因式分解 x2-x+14因式分解 x2+x=6, y=x2(x A={x｜x2 y=x2(x x2-3x+1=0 x2/(x4-x2+1) x2-5x+1=0则x2+x2/1 x2-3x-1=0,求①x2 1/x2;②x2-1/x2