rewrite the expression wihtout using the absolute value symbol and smplify the result?

0 ⤊

rewrite the expression wihtout using the absolute value symbol and smplify the result?

l9-xl if x<9

i've been wreckin my brain tryin to solve this prob. it have something to do with neg and pos rules. and this is a precal problem.

2007-09-02 16:14:03 · 2 answers · asked by icygurl259 1 in Science & Mathematics ➔ Mathematics

2 answers

l9-xl if x<9

since x<9, 9 - x > 0
so if x<9 l9-xl = 9 - x

2007-09-02 16:17:31 · answer #1 · answered by vlee1225 6 · 0⤊ 0⤋

If x is less than 9 then "9 minus x" will always be greater than 0. Even if x has a large negative value, like -300
then 9 - (-300) = 9 + 300 = 309 (still positive).

Therefore, the absolute sign is not needed IF x < 9.

I do not know how one could then "simplify" the expression even more

2007-09-02 23:19:16 · answer #2 · answered by Raymond 7 · 0⤊ 0⤋