Simplify: (a) (x+y)^2-(x-y) ^2
Attachments:
Answers
Answered by
0
=(X+ Y +X-Y) (X+ Y -X+Y)
=2X *2Y
=4XY
=2X *2Y
=4XY
Answered by
2
Use the identities
(a+b)2= a2+b2+2ab
(a-b)2=a2+b2-2ab
(x2+y2+2xy) - (x2+y2-2xy)
x2+y2+2xy-x2-y2+2xy
(x2 and y2 will be cancelled bcoz of negative signs)
= 4xy is the answer
(a+b)2= a2+b2+2ab
(a-b)2=a2+b2-2ab
(x2+y2+2xy) - (x2+y2-2xy)
x2+y2+2xy-x2-y2+2xy
(x2 and y2 will be cancelled bcoz of negative signs)
= 4xy is the answer
Similar questions