Question

(a+b)x+(a-b)y=a²+2ab-b² , (a-b) (x+y) =a²-b²

Answer 1

Answer:

(a+b)x+(a-b)y=a²+2ab-b²

(a-b) (x+y) =a²-b²

(a-b) (x+y) = (a - b )( a + b )

x+ y = a + b

(a+b)x+(a-b)y=a²+2ab-b²

( x + y )x + ( a - b ) y = 2ab + (a-b) (x+y)

x² + xy + ay - b y = 2ab + ax + ya - xb - by

x² + xy   = 2ab + ax  - xb