anonymous
  • anonymous
Solve x2 + 5x = –6
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@Michele_Laino
anonymous
  • anonymous
Do you mean 2x ?
Michele_Laino
  • Michele_Laino
I can rewrite your equation, as follows: \[\Large {x^2} + 5x + 6 = 0\]

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anonymous
  • anonymous
yeah i just noticed that, very helpful
anonymous
  • anonymous
i think i got it actually, x=3 and x=2
Michele_Laino
  • Michele_Laino
I think that they are wrong, please apply this formula: \[\Large x = \frac{{ - b \pm \sqrt {{b^2} - 4 \times a \times c} }}{{2 \times a}}\] where: a=1, b=5, and c=6
Michele_Laino
  • Michele_Laino
more explanation: that formula above, is referring to the standard form of the quadratic equation: \[\Large a{x^2} + bx + c = 0\]
anonymous
  • anonymous
was i right?
Michele_Laino
  • Michele_Laino
I'm sorry, no, since you have to find two numbers whose sum is -5, and whose product is 6. Now the sum of your numbers is: 2+3=5 which is different from -5
anonymous
  • anonymous
so what about X=-3 and x=-2
Michele_Laino
  • Michele_Laino
that's right!
anonymous
  • anonymous
thank you!
Michele_Laino
  • Michele_Laino
:)

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