exam Maths Puzzle Numerical Ability

I wonder if you could assist me with this problem please:
ac-ad-bc+bd. It says to factor completely. Thank you.

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exam Other Question

Graph these inequalities:

4x+y>4 NOTE: the greater than sign is underlined! Thank you for your time!!!!
Mcgraw Hill 6th Edition. Chapter 7. Exercise #16.
What is the intersection of two lines?

What is the intersection of a line and a plane?