anonymous
  • anonymous
use the quadratic formula to solve the equation x^2+3=-4x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
okay first bring everything to one side so your equation = 0
anonymous
  • anonymous
now do you know what the quadratic formula is?
anonymous
  • anonymous
no

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anonymous
  • anonymous
http://schooltutoring.com/help/wp-content/uploads/2012/06/quadratic-equation-calculator.gif
anonymous
  • anonymous
this is it. now bring everything to the left in your equation
anonymous
  • anonymous
I don't understand how
anonymous
  • anonymous
okay, this is your equation --> x^2+3=-4x now im going to bring everything to the left --->\[x^2+4x+3=0\]
anonymous
  • anonymous
Okay, now what?
anonymous
  • anonymous
now this is the general formula for a quadratic ax^2+bx+c so now what from your equation is a, b and c?
anonymous
  • anonymous
I have no clue
anonymous
  • anonymous
okay here ill give you an example in this equation 2x^2 + 3x + 5 a=2 b=3 and c=5 in this equation 6x^2+9x+12 a=6 b=9 and c=12
anonymous
  • anonymous
so for x^2+4x+3 what is a, b and c?
anonymous
  • anonymous
a=2 b=4 c=3?
anonymous
  • anonymous
b and c are right but a=1 remember x^2 is really 1x^2. and its general formula is ax^2 so a=1
anonymous
  • anonymous
but yes a=1 b=4 and c=3 now just sub these into the quadratic equation that I gave you above
anonymous
  • anonymous
k hold on i'll try
anonymous
  • anonymous
sure, you shpuld get two answers
anonymous
  • anonymous
what does the plus sigh with the line under it mean?
anonymous
  • anonymous
lol because you have to get two answers for x (as it is a parabola and will intersect at the x axis in two place)s there are actually two quadratic equations
anonymous
  • anonymous
http://1.bp.blogspot.com/_1-QGTvcr_Ao/TQR2I3wvruI/AAAAAAAAABk/J2reKuLyFHw/s1600/Quadratic_Formula.jpg
anonymous
  • anonymous
one is -b + so on and the other is -b - something
anonymous
  • anonymous
okay
anonymous
  • anonymous
so what are your answers that you get?
anonymous
  • anonymous
1 and 3
anonymous
  • anonymous
its actually -1 and -3
anonymous
  • anonymous
oh oops. Thank you
anonymous
  • anonymous
no problem, glad to help!

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