CHAPTER 7 Objective 3.1  Exercises

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Simplify.

1.  - x² y( x -  y²)

2.   ab( a² - 3 ab - 4 b²)

3.  ( x² + 2  x + 1)( x + 2)

4.  (2 y² + 4 y -2)(2 y - 1)

5.  (2 y - 9)( y + 1)

6.  (2 a +  b)( a + 2 b)

7.(6 x + 5)(6 x -5)

8.  (2 a + 3 b) ²

Solve.

9.  The length of a side of a square is  x + 3. Use the equation  A =  s², where  s is the length of a side of a square, to find the area of the square in terms of the variable  x.

10.  The radius of a circle is 2  x + 1. Find the area of the circle in terms of the variable  x. Use 3.14 for .

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