We know the form of the answer because we were totally paying attention, so we write it down:
(3x3)2 - 2×(3x3)(5x) + (5x)2.
Then we simplify for
9x6 - 30x4 + 25x2.
Notice how much simpler things are now than when we started. Instead of having to write down the distributive property two or three times for every problem, we have quick and easy patterns to follow. Welcome to Shortcut City. Never been there? Follow us...we know a shortcut.