Simplify the rational expressions:?

1 ⤊

2x-1/1 – 2x

2007-12-23 04:30:08 · 4 answers · asked by Marcia O 1 in Science & Mathematics ➔ Mathematics

2x-1/1 – 2x

2007-12-23 04:31:35 · update #1

(2x - 1)/(1 - 2x) Notice that: (1-2x) = -(2x-1)
= (2x - 1)/ -(2x - 1)
= -1

2007-12-23 04:36:00 · answer #1 · answered by Smart Ambitious 2 · 1⤊ 0⤋

(2x-1)/(1–2x)=[-(-2x+1)]/(1-2x)=-(1-2x)/(1-2x)=-1 which holds for all x except for x=-1/2

2007-12-23 04:40:34 · answer #2 · answered by ♥*´`*•.katie.•*´`*♥ 2 · 0⤊ 0⤋

Spider, give a value to x and solve.
Let x=2 -> 3/-3 = -1
Let x=3 -> 5/-5 = -1
So the answer is not 1 but -1

2007-12-23 04:38:00 · answer #3 · answered by RobRoy 3 · 0⤊ 0⤋

2x-1
--------= 1
1-2x

2007-12-23 04:32:49 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 1⤋