Question

if x+y =1 & xy= 12 find x-y and xsquare - y square

Answer 1

x² + y² = ( x+ y ) ² - 2ab

= 1²- 24

=     -23

again.,

a² + b² = ( x- y )² + 2ab

⇒   -23 = ( x- y )² + 24

⇒ ( x- y )²  =  - 47

∴ x-y = √ - 47