Question

what expression does this set of algebra tiles represent?
$x^2$ $x^2$ $-x$ $-x$ $-x$ $-x$ $-x$
combine like terms. for example, write 3 instead of 1 + 1 + 1.

Explanation:

Step1: Count $x^2$ tiles

There are 2 tiles labeled $x^2$, so this term is $2x^2$.

Step2: Count $-x$ tiles

There are 5 tiles labeled $-x$, so this term is $-5x$.

Step3: Combine like terms

Add the two simplified terms together.
$2x^2 + (-5x)$

Answer:

$2x^2 - 5x$