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The simplified expression is
.
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To solve
using algebra tiles, start by representing each term with tiles. Use red tiles to represent
and yellow tiles for
.
First, you have
represented by 9 red inverted tiles and
by 9 yellow tiles. Then, subtract
which is again represented by 9 red inverted tiles and
as 1 yellow tile.
Now combine:
- For the
tiles: (you can pair up with indicating they cancel each other). - For the
tiles: resulting in .
Thus, the final simplified expression is
.
The answer is therefore
.