anonymous
  • anonymous
Use the quadratic formula to solve x2 + 5x = –2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Hero
  • Hero
rewrite it as x^2 +5x + 2 = 0
Hero
  • Hero
a = 1 b = 5 c = 2 Plug that into the formula and solve
Hero
  • Hero
By the way, the formula is \[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]

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anonymous
  • anonymous
\[x^2 + 5x = -2 \] should be rearranged such the Right Hand Side (RHS) is 0. You can do that by adding 2 to both sides of the equation.
anonymous
  • anonymous
That would make it \[x^2 + 5x + 2 = 0\] the quadratic formular is \[(-b \pm \sqrt{b^2 - 4ac})/2a\] a is the coeffecient of x^2 so a = 1 b is the coeffecient of x so b = 5 c is the constant term so c = 2
anonymous
  • anonymous
So my answer would be -5sqrt17/2?
anonymous
  • anonymous
\[-5\pm \sqrt{17}\]
anonymous
  • anonymous
Where would the 2 go?
anonymous
  • anonymous
You mean the 2 that was on the RHS ? It would come over to the LHS and become the constant term
anonymous
  • anonymous
Oh sorry. My mistake. I see what you mean \[(-5\pm \sqrt{17})/2\]
anonymous
  • anonymous
I hope I got it right this time :)
anonymous
  • anonymous
Okay thank you so much :)

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