anonymous
  • anonymous
What are the solutions of the equation 9x^4 – 2x^2 – 7 = 0? Use u substitution to solve.
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@GIL.ojei
anonymous
  • anonymous
@butterflydreamer please help
butterflydreamer
  • butterflydreamer
|dw:1440596622184:dw|

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anonymous
  • anonymous
factorise? sorry i suck at math lol
butterflydreamer
  • butterflydreamer
have you learnt factorisation yet?
anonymous
  • anonymous
no i dont think so
butterflydreamer
  • butterflydreamer
so you haven't learnt the thing with the two brackets? for e.g. x^2 - 3x- 4 = (x + 1 ) ( x - 4 )
anonymous
  • anonymous
no :(
butterflydreamer
  • butterflydreamer
.... then... i'm not sure how you are meant to solve this if you haven't learnt how to factorise yet D:
anonymous
  • anonymous
ikr its on this big test thing and if i make a 100 i get to skip the whole class or if i make a 80 skip 80% of the class
butterflydreamer
  • butterflydreamer
hmm.. you should really learn how to factorise first or else it'll be pretty hard to explain this question... :( sorry

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