Question

Here is a vary simple absolute value equation.
I 10X I = -20

I got 2 solutions x= { 2, -2 }
but the comp. program said I was wrong. Can any one verify.

Answer 1

not possible

Answer 2

no solution

Answer 3

|a| = a
|-a| = a

so absolute value is always positive

Answer 4

please explain

Answer 5

for any a

\[|a|\ge 0\]

therefore it is impossible for |10x|=-20

Answer 6

But I 10x I = 20
If i /2 on both sides then x = 2

Answer 7

for I10x I = 20

the solution is x=-2,2

Answer 8

In plain English we can say that absolute value of any number, whether negative or positive, is always positive. So it can never give a negative result...

| 10x | can never be equal to a negative 20

Answer 9

Now u r changing your question, initially you said that right side was -2, go up and see your post

Answer 10

Oh !
some times i think I am brain dead
thanks, I see the light.....

Answer 11

yes I see I was thinking 20 and not seeing -20 your right.
I am in a partial coma I think.

Answer 12

sometimes when we work for long hours, we tend to become like this...........no big deal.............☺☻

Answer 13

true..... 50 hrs per week <> plus school.............

Answer 14

I will suggest that you do maths is "short bursts" of about 45 minutes each and after each burst stop doing maths and study something else like English or social studies etc. for an hour and then again do maths for 45 minutes........

This way the "maths centre" of your brain will get some time to rest and recover and then you will start afresh......☺

Just try this out and see the difference........

Answer 15

Thanks