anonymous
  • anonymous
Using quadractic formula, please solve for me, x +11x-12=0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
it should be x2+11x-12=0
anonymous
  • anonymous
u can solve this by factorising
amistre64
  • amistre64
the quad formula is simply plug and play; why would you need someone to do it for you?

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anonymous
  • anonymous
gernic rectangels
anonymous
  • anonymous
I wanna make sure i'm coming up with the right answer Amistre
amistre64
  • amistre64
whats your answer then? and we can check it ;)
anonymous
  • anonymous
-11 13squared
anonymous
  • anonymous
oops
amistre64
  • amistre64
it actually checks itself ; plug in the x values you find and see if they make it equal 0
anonymous
  • anonymous
oh ok:/
amistre64
  • amistre64
you should come up with x = -12 and 1, if i see it right
anonymous
  • anonymous
yep amis
amistre64
  • amistre64
-b sqrt(b^2 -4ac) -- +- ------------- 2a 2a
amistre64
  • amistre64
-11 sqrt(121 +48) ---- +- ------------ 2 2
amistre64
  • amistre64
-11 +- sqrt(169) -11 +- 13 --------------- = ---------- 2 2 -24/2 = -12 2/2 = 1
anonymous
  • anonymous
Thanks Amis don't know where i went wrong
amistre64
  • amistre64
you were close; you just forgot the "/2" and also to make sure that you use the "+-" and not just the a "+" for the sqrt
anonymous
  • anonymous
Oh ok

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