anonymous
  • anonymous
i have to determine the number of solutions of this quadratic equation and solve it
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
whats the equation
anonymous
  • anonymous
\[-4y ^{2}+3=-7y\]
anonymous
  • anonymous
Well let's set that = 0 first (and, for ease, have it on the side so y^2 is positive)

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anonymous
  • anonymous
and it should be 2 answers if you are using the quadratic equation
amistre64
  • amistre64
the number of solutions?
anonymous
  • anonymous
yeah it's an online assignment so once I determine how many solutions and whither they are real or not I select that and type in the answers
anonymous
  • anonymous
it's either 2 different real solutions or 2 non-real solutions
amistre64
  • amistre64
the solutions are infinite and create a parabolic curve on a graph....
anonymous
  • anonymous
Ugh, horrible, horrible radical solutions. I'm out. And isn't it just a quadratic with 2 (yes, I checked, there should be 2 real ones)
amistre64
  • amistre64
or am I confusing definitions......
amistre64
  • amistre64
if it equals zero, then there is at most 2 real solutions...youre right :)
anonymous
  • anonymous
Sorry if i was confusing in my explanation. Basically i just need to solve that now. THanks
amistre64
  • amistre64
-1(4y^2 -7y -3) = 0 4y^2 -7y -3 = 0 7/8 +- sqrt(49+48)/8
anonymous
  • anonymous
ok so the 49 +48 makes 97. would this be put over 8, and the 7 is over 8 as well?
amistre64
  • amistre64
yes.

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