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Dyhtps2197 Dyhtps2197
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9 years ago
(3-x^2)(x-3)(x+4)≤0

any idea how that work???
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wrote...
Educator
9 years ago
Hey, check the attachment, I solved it for you.

Some rules for you...

   - When you multiply both a and b by a positive number, the inequality stays the same.
   - But when you multiply both a and b by a negative number, the inequality swaps over.
wrote...
Educator
9 years ago
Can't believe I forgot the attachment! Sad Dummy
 Attached file 
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Dyhtps2197 Author
wrote...
9 years ago
but why couldn't it be x= - √3???
wrote...
Educator
9 years ago
Evaluate

3 - (-SQRT(3)) and you will not get zero. It's only when you remove the subtraction do you get zero.
wrote...
Donated
Trusted Member
9 years ago
pls mark as solved
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