Question

19. If x and y are the roots of the equation ax+bx+c=0
find the value of
(x/y - y/x)^2​

Answer 1

Step-by-step explanation:

cross multiply them and use a_b^2formula

Answer 2

Step-by-step explanation:

(x/y - y/x)^2

{(x^2-y^2)/xy}^2. {x^2-y^2}^2={(x+y)(x-y)}^2

(-b/a)^2{(-b/a)^2-4c/a}. (x-y)^2=(x+y)^2-4xy

(b^2/a^2).{(b^2-4ac)/a^2}