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how would i solve this inequality?

p29

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

Mistake on the x^2?

Original post by IYGB

Mistake on the x^2?

waddya mean?

Reply 3

B_9710

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).

Reply 4

GeorgeAndLennie

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^)

(edited 7 years ago)

Reply 5

IYGB