# how would i solve this inequality?Watch

Thread starter 2 years ago
#1
x(x+11)<3(1-x^2)
i turned it into a quadratic equation but now im unable to factorise it
-2x^2-11x-3<0
plz elp
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2 years ago
#2
Mistake on the x^2?
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Thread starter 2 years ago
#3
(Original post by IYGB)
Mistake on the x^2?
waddya mean?
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2 years ago
#4
You have made a mistake. But even from there you should still be able to solve it (complete the square, quadratic formula to find 'critical values') as of course not all quadratics can be factorised nicely (normal A level factorising at least).
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2 years ago
#5
What is the ^2? Because x+11 you turned the "quadratic equation" into ^2. Maybe you meant to leave that as ^11 and x as -3?

-2x^4x^2(1-x^2) so -2x will remain the same -2x^3(1x^)
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2 years ago
#6
(Original post by p29)
waddya mean?
4x^2 no?
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2 years ago
#7
(Original post by IYGB)
4x^2 no?
Yeah this instead ^ made a mistake with 11
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Thread starter 2 years ago
#8
(Original post by IYGB)
4x^2 no?
ohhh yea just realised lol thanks
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