anonymous
  • anonymous
A quadratic equation is shown below: 3x2 - 16x + 2 = 0 Part A: Describe the solution(s) to the equation by just determining the radicand. Show your work. (3 points) Part B: Solve 9x2 + 3x - 2 = 0 by using an appropriate method. Show the steps of your work, and explain why you chose the method used. (4 points) Part C: Solve 3x2 - 10x + 2 = 0 by using a method different from the one you used in Part B. Show the steps of your work. (3 points)
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
start by writing down the quadratic equation, then identify the value for each variable.
anonymous
  • anonymous
Ok, s the quadratic equation is 3x^2 - 16x + 2 = 0
anonymous
  • anonymous
that's the equation for your parabola. The quadratic equation is used to find when and where a parabola crosses the x-axis. In other words, it identifies your x-intercepts.

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anonymous
  • anonymous
|dw:1440103710100:dw|
anonymous
  • anonymous
that's the quadratic equation...parabolas are written as \[ax ^{2}+bx+c=0\]
anonymous
  • anonymous
A = 3 B = -16 C = -2
anonymous
  • anonymous
So then B2 - 4AC = 256 - (-24) = 280
anonymous
  • anonymous
if you're on the first one, c isn't -2
anonymous
  • anonymous
6 ± √ 280 x = —————— 6
anonymous
  • anonymous
ohhhh
anonymous
  • anonymous
Then this? A = 3 B = -16 C = 2 B2 - 4AC = 256 - 24 = 232
anonymous
  • anonymous
16 ± √ 232 x = —————— 6
anonymous
  • anonymous
right?
anonymous
  • anonymous
yes...it's not going to be a rational number. sometimes teachers will ask that you simplify what's in the radical, but I wouldn't unless you know you have to.
anonymous
  • anonymous
So what do I do then?
anonymous
  • anonymous
Help anyone :(

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