S
  • S
how to find x in x^2-x-1 ?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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radar
  • radar
As is, you do not have an equation. What is that expression equal to?
S
  • S
to 0
lgbasallote
  • lgbasallote
|dw:1337559134977:dw| i found x

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radar
  • radar
The quadratic formula seems like a good candiate. OMG lgbasallote has already found x!
lgbasallote
  • lgbasallote
teachers should phrase it as solve for x :P find x is tooo easy (unless x happens to be wally)
S
  • S
that was not helpful at all , but I understand your point
lgbasallote
  • lgbasallote
on a helpful note though...use either completing the square or q.f.
lgbasallote
  • lgbasallote
it is not factorable...i can give you that
radar
  • radar
\[x ^{2}+x-1=0\]A=1 B=1 C=-1 Use quadratic formula.
anonymous
  • anonymous
C would be +1, when you move it to the other side of the equation
radar
  • radar
x=[-1+/-sqrt(1+4]/2 \[=(-1\pm \sqrt{5})/2\]

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