Question

xy+yz+zx=1 then (1+y²):(x+y)(y+z)=?
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Answer 1

Answer:

Step-by-step explanation:

Given, xy+yz+zx=1

(1+y square ) : (x+y)(y+z)

=(1+ y square ) : (xy+zx+y square +yz)

=(1+y square ) : (xy+yz+zx+y square )

= (1+y square ) : (1+y square ) [since xy+yz+zx=1]

=1:1