Question

(a + b) (c-d) + ( c + d) (a – b) + 2(ac + bd )

Answer 1

Answer:

4ac

Step-by-step explanation:

Answer given in picture

Answer 2

Answer:

( a+b )( c-d ) + ( c+d )( a-b ) + 2( ac+bd )

ac-ad+bc-bd+ca-cb+da-db+2ac+2bd

ac+2ac+ac-ad+ad-bc-bc-bd-bd+2bd

4ac - 2bc

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