Question

(a-b) (a+b)-(a+b)(a+b)

Answer 1

Answer:

a²-b² -(a²+b²

a²-b²-a²-b²

-2b²...

Step-by-step explanation:

hope this helps you

Answer 2

Answer:

-2b(b-a) is the required solution..

Step-by-step explanation:

(a-b)(a+b)-(a+b)(a+b)

= $(a^{2} -b^{2} )-(a+b)^{2}$                              $[$$(a+b)(a-b)=(a^{2} - b^{2} )$$]$

= $a^{2} -b^{2} -(a^{2} +b^{2} +2ab)$                      $[(a+b)^{2} = a^{2} +b^{2} +2ab]$

= $a^{2} -b^{2} -a^{2} -b^{2} -2ab$

= $-2b^{2} -2ab$

= $-2b(b-a)$

HOPE IT HELPS!!