dave13 wrote:
i would appreciate you could take time to answrr my questions below
thank you!
Question 1. Why do we need to multiply the numerator and denominator of LHS with (x – 9)*(x – 4) in which cases do we need to do so ?
Question 2. if the denominator of the above inequality is always greater than 0 and x ≠ 4 or 9, since the denominator cannot be equal to 0. WHY do we remove whole denominator in the end, leave only this (x - 2) (x – 4)(x - 9) ≤ 0 ???
Question 3. And the last question
is it gramatically paralel structure to say "
Approach and Working"
may be "
Aprroach and Work" is better or "
Approach first and then start Working"
how about "
approach while working and by the time you approach it will be solved"
Hey
dave13The answer to question 1 is that they do so to make the denominator a square.
Remember a square of a number/expression can never be negative. Now, that
we have that in order, for the overall expression to be neagtive or equal to zero,
the numerator must be negative or have a value of zero at maximum.
That's the reason why they remove the denominator and keep only the numerator
Hope that answers your second question.
As for your thid question, I am sure
generis will have an answer. Unfortunately,
I am not qualified to make that judgement
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