madmerc
  • madmerc
Solve. 14x^2 + 42x + 70 = 0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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welshfella
  • welshfella
there are no real solutions because we have the square root of a negative number
welshfella
  • welshfella
are you familiar with complex numbers?

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madmerc
  • madmerc
@judge2020 @welshfella the answer choices are \[1\pm i \sqrt{11}\] \[\frac{ -3 \pm i \sqrt29 }{ 2 }\] \[\frac{ -3 \pm 2i \sqrt29 }{ 2 }\] \[\frac{ -3 \pm i \sqrt 11 }{ 2 }\]
welshfella
  • welshfella
the calculation can be made easier by dividing the equation by 14 this gives x^2 +3x + 5 = 0
welshfella
  • welshfella
x = [-3 +/1 sqrt(3^2 - 20)] / 2 = [-3 +/- sqrt(-11)] / 2
welshfella
  • welshfella
can you see which one it is?
welshfella
  • welshfella
recall that sqrt(-1) is written as i
madmerc
  • madmerc
so it's the last one? thank you!
welshfella
  • welshfella
yes
welshfella
  • welshfella
yw

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