### Home > MC2 > Chapter 5 > Lesson 5.2.1 > Problem5-45

5-45.

Write the expression shown on each of the Expression Mats below, then simplify them by making zeros and combining like terms. .

Notice that a grey tile and a white tile of the same value cancel each other out and make a zero.

Now write an expression for the values that remain.

$−2$

See part (a).

$2x^2 + 3x − 1$

Use the eTool below to solve part (a).
Click the link at right for the full version of the eTool: MC2 5-45a HW eTool

Use the eTool below to solve part (b).
Click the link at right for the full version of the eTool: MC2 5-45b HW eTool