Question

Tell me the answer of this fast (a+b)(c-d)+(a-b)(c+d)+2(ac+bd)

Answer 1

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

ac- bd + ac - bd+2ac+2bd

2ac-2bd +2bd+2ac

2ac+2ac

4ac

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Answer 2

hey mate, there is your answer

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

= (ac-ad+bc-bd) +(ac+ad-bc-bd) +2ac+2bd

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

= 2ac - 2bd + 2ac + 2bd

= 4ac .
so the answer of this equation is 4ac
i hope it's help you