Factorise :2(ab + cd ) - a? - b? + c? + d?

Dear student,
Your question is not clear and appears to be incomplete.
Please be little specific so that we can provide you with some meaningful help.
Looking forward to hearing from you again!
Regards

  • 0
Your question seems to be incomplete 
can u be specific about the ? sign 
  • 1
Dear student,
I hope this is your question,
Hope this helps!

  • 1
Here -
  • 1
What are you looking for?