Question

what expression does this set of algebra tiles represent?
combine like terms. for example, write 3 instead of 1 + 1 + 1.

Explanation:

Step1: Count $x^2$ tiles

There are 9 blue $x^2$ tiles, so the term is $9x^2$.

Step2: Count $-x$ tiles

There are $9 + 1 = 10$ red $-x$ tiles, so the term is $-10x$.

Step3: Count $-1$ tiles

There are 3 red $-1$ tiles, so the term is $-3$.

Step4: Combine all terms

Add the three simplified terms together.
$9x^2 - 10x - 3$

Answer:

$9x^2 - 10x - 3$