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Mathematics 12 Online
OpenStudy (anonymous):

how can i find the solution of x-a= 1/x ?

OpenStudy (anonymous):

cross multiply ==> x^2-ax-1=0, solve for x

OpenStudy (anonymous):

u factor out an x than what?

OpenStudy (anonymous):

to solve the quadratic equation , ot's better here to use the quadratic formula

OpenStudy (anonymous):

so u would have x= a + - sqrt a^2 -4(x)(1)/ 2x?

OpenStudy (anonymous):

for x^2-ax-1=0 ==> we got [-a + - sqrt(a^2-4*1*1)] / 2(1)

OpenStudy (anonymous):

you put the coefficient of x^2 and coeffcient of x

OpenStudy (anonymous):

Ohhh yaaa so you would get -a +- sqrt a^2 +4/2

OpenStudy (anonymous):

than -a +- a+2/2 ?

OpenStudy (anonymous):

[-a + - sqrt(a^2+4)] / 2 , exactly

OpenStudy (anonymous):

thanks a lot:)

OpenStudy (anonymous):

any time

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