Question

Prove that the expression (x+y)(x-y) is equal to (x²-y²)

Answer 1

Answer:

Here's your answer.

In the given question we have to prove ( x + y ) ( x - y ) = ( x² - y² )

Now, we move on to the LHS.

= ( x + y ) ( x - y )

= ( x² - xy ) + ( xy - y² )

=  x² - y² - xy + xy

= x² - y² = RHS  --------------------------- ( after cancelling out (-xy) and (xy) )

Hence proved, and, I hope this helps you.