CPM Homework Help : CAAC Problem 7-77

Simplify the following expressions. Homework Help ✎
1. 15x² − 3x(4 + 5x)
2. (24x − 9) + 10
3. (x − 3)(x + 1) + 2x
4. 6x − 2 + 9 − 3y − x

Hint (a):

Distribute to remove the parenthesis.
15x² − 12x − 15x²
Add like terms.
12x

Hint (b):

Follow the steps outlined in part (a).

Hint (c):

Start with a generic rectangle to simplify, then use the same method as part (a).

Answer (c):

x² − 3

Hint (d):

Use the strategy shown in part (a) to solve this problem.