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

what expression does this set of algebra tiles represent? combine like terms. for example, write 3 instead of 1 + 1 + 1.
Answer
Explanation:
Step1: Count $x^2$ tiles
There are 3 tiles of $x^2$, so the term is $3x^2$.
Step2: Count $x$ tiles
There are 3 + 4 = 7 tiles of $x$, so the term is $7x$.
Step3: Count - 1 tiles
There are 2 tiles of - 1, so the term is - 2.
Step4: Combine like - terms
The expression is $3x^2+7x - 2$.
Answer:
$3x^2+7x - 2$