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 8 tiles of $-x^2$, so this term is $8(-x^2) = -8x^2$.

Step2: Count $x$ tiles

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

Step3: Count $-1$ tiles

There are 7 tiles of $-1$, so this term is $7(-1) = -7$.

Step4: Combine all terms

Add the three simplified terms together.

Answer:

$-8x^2 + 5x - 7$