anonymous
  • anonymous
Solve x2 + 6x + 7 = 0. x = −1 and x = −5 3 plus or minus square root of 2 negative 3 plus or minus square root of 2 quantity of negative 3 plus or minus square root of 2 all over 2
Mathematics
katieb
  • katieb
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Nnesha
  • Nnesha
apply the quadratic formula \[\huge\rm x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\] plugin a ,b ,c values \[\huge\rm Ax^2+Bx+C\]quadratic equation where a=leading coefficient b=middle term c=constant term
Nnesha
  • Nnesha
what is a in that equation a= ? b=? c=?
anonymous
  • anonymous
1

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Nnesha
  • Nnesha
yes right a =1 b= ? c=??
Nnesha
  • Nnesha
b =middle term c=constant
anonymous
  • anonymous
6x
anonymous
  • anonymous
7
Nnesha
  • Nnesha
just the coefficient so b=6 a=1,b=6, c=7 now substitute a , b ,c for their values into quadratic formula
anonymous
  • anonymous
okay
anonymous
  • anonymous
This method works just fine. However, in this problem, it would be easier to factor.
anonymous
  • anonymous
would it be d?
Nnesha
  • Nnesha
it's not factorable.
Nnesha
  • Nnesha
and no what did you get 't the numerator ?
anonymous
  • anonymous
-3 plus or minus the suare root of -22
Nnesha
  • Nnesha
hmm no how did you get -22 ???
anonymous
  • anonymous
i had done 6- (4)(1)(7), but i realize 6 needs to be squared, so i now get -3 +- square root of 2?
anonymous
  • anonymous
2
Nnesha
  • Nnesha
ugghhhhh nvm sorry latex arn't working
anonymous
  • anonymous
what...?
Nnesha
  • Nnesha
yes that's right take square of 6
Nnesha
  • Nnesha
i was trying to type that into the equation tool but it's not loading

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