Question

if one root of 5x^2+13+k is reciprocal of other. find k.

Answer 1

a*1/a=k/5
k=5

Answer 2

how it is possible

Answer 3

the product of the roots of a quadratic equation is c/a where the equation is ax^2+bx+c=0
here a=5,b=13 and c=k

Answer 4

how b=13 it is constant

Answer 5

it must be 13x

Answer 6

otherwise
x^2=-(13+k)/5

if x^2=a^2
then x=a,-a
not reciprocal...