Question

1.
Simplify: (a+b) (c-d) + (a-b) (c+d)+2(ac+bd)​

Answer 1

Answer:

4ac

Step-by-step explanation:

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

now we multiply each other ,

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

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

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

= 4ac