## S 3 years ago how to find x in x^2-x-1 ?

As is, you do not have an equation. What is that expression equal to?

2. S

to 0

3. lgbasallote

|dw:1337559134977:dw| i found x

The quadratic formula seems like a good candiate. OMG lgbasallote has already found x!

5. lgbasallote

teachers should phrase it as solve for x :P find x is tooo easy (unless x happens to be wally)

6. S

that was not helpful at all , but I understand your point

7. lgbasallote

on a helpful note though...use either completing the square or q.f.

8. lgbasallote

it is not factorable...i can give you that

$x ^{2}+x-1=0$A=1 B=1 C=-1 Use quadratic formula.

10. akamushi

C would be +1, when you move it to the other side of the equation

x=[-1+/-sqrt(1+4]/2 $=(-1\pm \sqrt{5})/2$