This could either become:
OR:
Why do these equations have different answers? What I did was change the side on one side of the equation, and solve for x.
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This could either become:
OR:
Why do these equations have different answers? What I did was change the side on one side of the equation, and solve for x.
If you change the sign, you must flip the inequality too.
Sorry sorry, I did my stupid old thing again by not giving the whole sum. This is the whole sum:
Solve the inequality
The mark scheme gives the correct answer as being
Aha, I get the right answer then. So what was wrong with my method, and why didn't it work? Should I always use the 'square both sides' method when it comes to solving modulus functions like this then?
Hello, yorkey!
Quote:
You could graph the expressions.
is a shaped graph with its vertex at (3,0).
is a shaped graph with its vertex at (2,0).
When is above ?
Answer: .Code:
*  .
*  .
* .
 o
. .
. .  . .
. .  . .
y2 . .  . . y1
    .  +  +  +  +  .    
2 1  1 2 3

Thank you! But I'm afraid I don't have time. It's my exams coming up, and this is but the shortest type of question that I can expect and it should take me only a minute or two.
Alright, thank you very much!