anonymous
  • anonymous
3x² + 21x = 12, can someone explain to me how to find the value of x?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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pooja195
  • pooja195
Well is this meant to be one of those quadratic equations?
anonymous
  • anonymous
yes, its something ive been having troubles with.
anonymous
  • anonymous
whoops, the question was mistyped, here is the equasion 3x² + 21x + 2 = 14

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pooja195
  • pooja195
ok \[\huge~\rm~ax^2+bx+c=0 \] is this familiar?
anonymous
  • anonymous
yeah.
pooja195
  • pooja195
Alright so make your given equation = 0 then list your abc values
anonymous
  • anonymous
3x² + 21x + 2 = (0?) a = 3 b = 21 c = 2
pooja195
  • pooja195
We need to subtract 2-14=?
anonymous
  • anonymous
3x² + 21x = 12?
pooja195
  • pooja195
No... it would -12 then you would do 3x^2+21x-12=0 Now list the abc values
anonymous
  • anonymous
i think i figured it out now, thanks
pooja195
  • pooja195
what did you get?

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