Question

if x=(-26) and y=54 show that x-y #y-x​

Answer 1

Given, x−y=7 and xy=9

x−y=7

Squaring both sides, we get,

(x−y)

2

=7

2

=>x

2

+y

2

−2xy=49

=>x

2

+y

2

−2(9)=49

=>x

2

+y

2

=49+18

=>x

2

+y

2

=67

Answer 2

$\huge \bf \orange{Aηswer}$

Given, x−y=7 and xy=9

   x−y=7

Squaring both sides, we get,

   (x−y)² =7²

=>x²+y²−2xy=49

=>x²+y²−2(9)=49

=>x²+y²=49+18

=>x²+y²=67