how would i solve this inequality? Watch

p29
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#1
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#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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IYGB
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#2
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Mistake on the x^2?
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p29
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#3
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(Original post by IYGB)
Mistake on the x^2?
waddya mean?
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B_9710
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#4
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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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GeorgeAndLennie
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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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IYGB
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#6
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(Original post by p29)
waddya mean?
4x^2 no?
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GeorgeAndLennie
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#7
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(Original post by IYGB)
4x^2 no?
Yeah this instead ^ made a mistake with 11
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p29
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#8
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(Original post by IYGB)
4x^2 no?
ohhh yea just realised lol thanks
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