anonymous
  • anonymous
0=x^2-9x+4
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
I can't figure out how to find the two solutions? how can you factor this?
anonymous
  • anonymous
Use fomula for quadratic equation
anonymous
  • anonymous
use the formula ax^2+bx+c \[x=(-b \pm \sqrt{b ^{2}-4ac})/2a\]

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anonymous
  • anonymous
oh ok
anonymous
  • anonymous
b= -9??
anonymous
  • anonymous
wait i got it
anonymous
  • anonymous
|dw:1320973352751:dw|
anonymous
  • anonymous
For example, for the quadratic equation x2 + x - 12 = 0, x = 3 and x = -4 are both roots ... 9x2 = 81 (a = 9, b = 0, c = -81 since we could subtract 81 from both sides) ...
anonymous
  • anonymous
x=6.21
anonymous
  • anonymous
yes b = -9
anonymous
  • anonymous
Quadratic Equations AlgebraIn this case, the equation x2 - x - 2 = 0 can be broken apart into two factors [i.e., ... 9x2 = 81 (a = 9, b = 0, c = -81 since we could subtract 81 from both sides) ...
anonymous
  • anonymous
yes a=1, b=-9,c=4
anonymous
  • anonymous
I got 9 +- sqrt 65 / 2
anonymous
  • anonymous
yes (9+- sqrt65)/2
anonymous
  • anonymous
would that be the answer?
anonymous
  • anonymous
Exactly
anonymous
  • anonymous
can u helpp me
anonymous
  • anonymous
or someone
anonymous
  • anonymous
your value for x=6.21
anonymous
  • anonymous
can u help meeee plzzz
anonymous
  • anonymous
i already told you the answer is x=6.21

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