| x+4/5|-1/2=0. ( Tìm x )

2 bình luận về “| x+4/5|-1/2=0. ( Tìm x )”

1. |x + 4/5|-1/2=0

   |x + 4/5| = 1/2

   TH1: 

   x + 4/5 = 1/2

   x = 1/2 – 4/5

   x = -3/10

   TH2:

   x + 4/5 = -1/2

   x = -1/2 – 4/5

   x = -13/10

   Vậy x = -3/10 hoặc x = -13/10

   Trả lời
2. Giải đáp:

   |x+\frac{4}{5}|-\frac{1}{2}=0

   => |x+\frac{4}{5}|=\frac{1}{2}

   Ta xét 2TH:

   +)TH1: x+\frac{4}{5}=\frac{1}{2}

   => x=\frac{1}{2}-\frac{4}{5}

   => x=\frac{5}{10}-\frac{8}{10}

   => x=-\frac{3}{10}

   +)TH2: x+\frac{4}{5}=-\frac{1}{2}

   => x=\frac{-1}{2}-\frac{4}{5}

   => x=-\frac{5}{10}-\frac{8}{10}

   => x=-\frac{13}{10}

   Vậy x\in{-\frac{3}{10};-\frac{13}{10}}

   #DYNA

   Trả lời